21123302013023 has 16 divisors (see below), whose sum is σ = 24974617135680. Its totient is φ = 17480474785536.

The previous prime is 21123302013019. The next prime is 21123302013031. The reversal of 21123302013023 is 32031020332112.

It is not a de Polignac number, because 21123302013023 - 2² = 21123302013019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21123302013023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123302013623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1449611 + ... + 6659427.

It is an arithmetic number, because the mean of its divisors is an integer number (1560913570980).

Almost surely, 2^{21123302013023} is an apocalyptic number.

21123302013023 is a deficient number, since it is larger than the sum of its proper divisors (3851315122657).

21123302013023 is a wasteful number, since it uses less digits than its factorization.

21123302013023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5229826.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21123302013023 its reverse (32031020332112), we get a palindrome (53154322345135).

The spelling of 21123302013023 in words is "twenty-one trillion, one hundred twenty-three billion, three hundred two million, thirteen thousand, twenty-three".