21103232112023 has 4 divisors (see below), whose sum is σ = 21110240827128. Its totient is φ = 21096223396920.

The previous prime is 21103232111989. The next prime is 21103232112041. The reversal of 21103232112023 is 32021123230112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21103232112023 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 21103232112023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103232112923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3504353036 + ... + 3504359057.

It is an arithmetic number, because the mean of its divisors is an integer number (5277560206782).

Almost surely, 2^{21103232112023} is an apocalyptic number.

21103232112023 is a deficient number, since it is larger than the sum of its proper divisors (7008715105).

21103232112023 is an equidigital number, since it uses as much as digits as its factorization.

21103232112023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7008715104.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21103232112023 its reverse (32021123230112), we get a palindrome (53124355342135).

The spelling of 21103232112023 in words is "twenty-one trillion, one hundred three billion, two hundred thirty-two million, one hundred twelve thousand, twenty-three".