21032231311323 has 40 divisors (see below), whose sum is σ = 32120207744592. Its totient is φ = 13711392059904.

The previous prime is 21032231311313. The next prime is 21032231311379. The reversal of 21032231311323 is 32311313223012.

21032231311323 is a `hidden beast` number, since 2 + 1 + 0 + 3 + 2 + 23 + 1 + 311 + 323 = 666.

It is not a de Polignac number, because 21032231311323 - 2²⁸ = 21031962875867 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21032231311313) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 13400590 + ... + 14887587.

Almost surely, 2^{21032231311323} is an apocalyptic number.

21032231311323 is a deficient number, since it is larger than the sum of its proper divisors (11087976433269).

21032231311323 is a wasteful number, since it uses less digits than its factorization.

21032231311323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28288393 (or 28288384 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 21032231311323 its reverse (32311313223012), we get a palindrome (53343544534335).

The spelling of 21032231311323 in words is "twenty-one trillion, thirty-two billion, two hundred thirty-one million, three hundred eleven thousand, three hundred twenty-three".