21003230512016 has 40 divisors (see below), whose sum is σ = 40717922767104. Its totient is φ = 10495380654720.

The previous prime is 21003230512009. The next prime is 21003230512037. The reversal of 21003230512016 is 61021503230012.

It is a happy number.

It is a super-2 number, since 2×21003230512016² (a number of 27 digits) contains 22 as substring.

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, 342281210 + ... + 342342566.

Almost surely, 2^{21003230512016} is an apocalyptic number.

It is an amenable number.

21003230512016 is a deficient number, since it is larger than the sum of its proper divisors (19714692255088).

21003230512016 is a wasteful number, since it uses less digits than its factorization.

21003230512016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73719 (or 73713 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 21003230512016 its reverse (61021503230012), we get a palindrome (82024733742028).

The spelling of 21003230512016 in words is "twenty-one trillion, three billion, two hundred thirty million, five hundred twelve thousand, sixteen".