21023102999999 has 32 divisors (see below), whose sum is σ = 23190552253440. Its totient is φ = 18976533230592.

The previous prime is 21023102999929. The next prime is 21023103000041. The reversal of 21023102999999 is 99999920132012.

It is a cyclic number.

It is not a de Polignac number, because 21023102999999 - 2³⁶ = 20954383523263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023102999929) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36677162 + ... + 37245944.

It is an arithmetic number, because the mean of its divisors is an integer number (724704757920).

Almost surely, 2^{21023102999999} is an apocalyptic number.

21023102999999 is a deficient number, since it is larger than the sum of its proper divisors (2167449253441).

21023102999999 is a wasteful number, since it uses less digits than its factorization.

21023102999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569759.

The product of its (nonzero) digits is 12754584, while the sum is 65.

The spelling of 21023102999999 in words is "twenty-one trillion, twenty-three billion, one hundred two million, nine hundred ninety-nine thousand, nine hundred ninety-nine".