231021223221321 has 24 divisors (see below), whose sum is σ = 359379279604800. Its totient is φ = 142161790494816.

The previous prime is 231021223221307. The next prime is 231021223221361. The reversal of 231021223221321 is 123122322120132.

231021223221321 is a `hidden beast` number, since 2 + 3 + 1 + 0 + 2 + 12 + 2 + 322 + 1 + 321 = 666.

It is not a de Polignac number, because 231021223221321 - 2⁵ = 231021223221289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231021223221361) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32262111 + ... + 38767076.

It is an arithmetic number, because the mean of its divisors is an integer number (14974136650200).

Almost surely, 2^{231021223221321} is an apocalyptic number.

It is an amenable number.

231021223221321 is a deficient number, since it is larger than the sum of its proper divisors (128358056383479).

231021223221321 is a wasteful number, since it uses less digits than its factorization.

231021223221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71057005 (or 71057002 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 231021223221321 its reverse (123122322120132), we get a palindrome (354143545341453).

The spelling of 231021223221321 in words is "two hundred thirty-one trillion, twenty-one billion, two hundred twenty-three million, two hundred twenty-one thousand, three hundred twenty-one".