21123301312232 has 16 divisors (see below), whose sum is σ = 45264217097760. Its totient is φ = 9052843419504.

The previous prime is 21123301312229. The next prime is 21123301312247. The reversal of 21123301312232 is 23221310332112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188600904518 + ... + 188600904629.

It is an arithmetic number, because the mean of its divisors is an integer number (2829013568610).

Almost surely, 2^{21123301312232} is an apocalyptic number.

It is an amenable number.

21123301312232 is an abundant number, since it is smaller than the sum of its proper divisors (24140915785528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21123301312232 is a wasteful number, since it uses less digits than its factorization.

21123301312232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377201809160 (or 377201809156 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 21123301312232 its reverse (23221310332112), we get a palindrome (44344611644344).

The spelling of 21123301312232 in words is "twenty-one trillion, one hundred twenty-three billion, three hundred one million, three hundred twelve thousand, two hundred thirty-two".