21113112312023 has 16 divisors (see below), whose sum is σ = 22035331075200. Its totient is φ = 20204618434560.

The previous prime is 21113112312013. The next prime is 21113112312073. The reversal of 21113112312023 is 32021321131112.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21113112312023 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 21113112312023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113112312013) 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, 5443028 + ... + 8476601.

It is an arithmetic number, because the mean of its divisors is an integer number (1377208192200).

Almost surely, 2^{21113112312023} is an apocalyptic number.

21113112312023 is a deficient number, since it is larger than the sum of its proper divisors (922218763177).

21113112312023 is a wasteful number, since it uses less digits than its factorization.

21113112312023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13920122.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 21113112312023 its reverse (32021321131112), we get a palindrome (53134433443135).

The spelling of 21113112312023 in words is "twenty-one trillion, one hundred thirteen billion, one hundred twelve million, three hundred twelve thousand, twenty-three".