21216030420314 has 16 divisors (see below), whose sum is σ = 31853705246568. Its totient is φ = 10598129068032.

The previous prime is 21216030420287. The next prime is 21216030420337. The reversal of 21216030420314 is 41302403061212.

It can be written as a sum of positive squares in 4 ways, for example, as 13414147976089 + 7801882444225 = 3662533^2 + 2793185^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200603792 + ... + 200709524.

Almost surely, 2^{21216030420314} is an apocalyptic number.

21216030420314 is a deficient number, since it is larger than the sum of its proper divisors (10637674826254).

21216030420314 is a wasteful number, since it uses less digits than its factorization.

21216030420314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198289.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 21216030420314 its reverse (41302403061212), we get a palindrome (62518433481526).

The spelling of 21216030420314 in words is "twenty-one trillion, two hundred sixteen billion, thirty million, four hundred twenty thousand, three hundred fourteen".