21002032311023 has 2 divisors, whose sum is σ = 21002032311024. Its totient is φ = 21002032311022.

The previous prime is 21002032311017. The next prime is 21002032311031. The reversal of 21002032311023 is 32011323020012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21002032311023 - 2⁸ = 21002032310767 is a prime.

It is a super-2 number, since 2×21002032311023² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21002032310986 and 21002032311004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002062311023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501016155511 + 10501016155512.

It is an arithmetic number, because the mean of its divisors is an integer number (10501016155512).

Almost surely, 2^{21002032311023} is an apocalyptic number.

21002032311023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002032311023 is an equidigital number, since it uses as much as digits as its factorization.

21002032311023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21002032311023 its reverse (32011323020012), we get a palindrome (53013355331035).

The spelling of 21002032311023 in words is "twenty-one trillion, two billion, thirty-two million, three hundred eleven thousand, twenty-three".