Adding body class to paginated pages when using nextpage quicktag in WordPress. http://sridharkatakam.com/add-body-class-paginated-pages-using-nextpage-quicktag-wordpress/

functions.php

<?php
//* Do NOT include the opening php tag

//* Add custom body class to the head
add_filter( 'body_class', 'sk_body_class' );
function sk_body_class( $classes ) {

	// If the current page is not a static Page or single Post, move on
	if ( ! is_page() && ! is_single() ) {
		return;
	}

	// Assign a custom class of "paged" to body element on 2nd paginated page onwards
	if ( (int) get_query_var( 'page' ) > 0 ) {
		$classes[] = 'paged';
	}

	return $classes;

}

gistfile1.php

<?php
//* Do NOT include the opening php tag

add_action( 'genesis_before_entry', 'remove_title_paged_pages' );
function remove_title_paged_pages() {

	// If the current page is not a static Page or single Post, move on
	if ( ! is_page() && ! is_single() ) {
		return;
	}

	// For 2nd paginated page onwards
	if ( (int) get_query_var( 'page' ) > 0 ) {
		//* Remove the entry title
		remove_action( 'genesis_entry_header', 'genesis_do_post_title' );
	}

}

gistfile2.txt

<!--nextpage-->

gistfile3.php

<?php
//* Do NOT include the opening php tag

//*  Add custom body class to the head
add_filter( 'body_class', 'sk_body_class' );
function sk_body_class( $classes ) {

	// If the current page is a static Page or single Post AND is not the first Page when paginated
	if ( ( is_page() || is_single() ) && get_query_var( 'page' ) != 0 ) {

		$classes[] = 'paged';
	}

	return $classes;

}

style.css

.paged .entry-header {
	display: none;
}