231331322022021 has 12 divisors (see below), whose sum is σ = 359848723145548. Its totient is φ = 142357736628864.

The previous prime is 231331322022007. The next prime is 231331322022067. The reversal of 231331322022021 is 120220223133132.

231331322022021 is a `hidden beast` number, since 2 + 3 + 1 + 331 + 322 + 0 + 2 + 2 + 0 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11136142971396 + 220195179050625 = 3337086^2 + 14838975^2 .

It is not a de Polignac number, because 231331322022021 - 2²⁷ = 231331187804293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231331322022821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 988595393140 + ... + 988595393373.

Almost surely, 2^{231331322022021} is an apocalyptic number.

It is an amenable number.

231331322022021 is a deficient number, since it is larger than the sum of its proper divisors (128517401123527).

231331322022021 is a wasteful number, since it uses less digits than its factorization.

231331322022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977190786532 (or 1977190786529 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 231331322022021 its reverse (120220223133132), we get a palindrome (351551545155153).

The spelling of 231331322022021 in words is "two hundred thirty-one trillion, three hundred thirty-one billion, three hundred twenty-two million, twenty-two thousand, twenty-one".