231321110132021 has 128 divisors (see below), whose sum is σ = 305905270809600. Its totient is φ = 169726067343360.

The previous prime is 231321110132003. The next prime is 231321110132027. The reversal of 231321110132021 is 120231011123132.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231321110132021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231321110132027) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 58965358766 + ... + 58965362688.

It is an arithmetic number, because the mean of its divisors is an integer number (2389884928200).

Almost surely, 2^{231321110132021} is an apocalyptic number.

It is an amenable number.

231321110132021 is a deficient number, since it is larger than the sum of its proper divisors (74584160677579).

231321110132021 is a wasteful number, since it uses less digits than its factorization.

231321110132021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5439.

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

Adding to 231321110132021 its reverse (120231011123132), we get a palindrome (351552121255153).

The spelling of 231321110132021 in words is "two hundred thirty-one trillion, three hundred twenty-one billion, one hundred ten million, one hundred thirty-two thousand, twenty-one".