321011220231 has 32 divisors (see below), whose sum is σ = 517434653120. Its totient is φ = 195508795392.

The previous prime is 321011220223. The next prime is 321011220293. The reversal of 321011220231 is 132022110123.

321011220231 is a `hidden beast` number, since 3 + 210 + 1 + 1 + 220 + 231 = 666.

It is not a de Polignac number, because 321011220231 - 2³ = 321011220223 is a prime.

It is a super-2 number, since 2×321011220231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321011220631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4680190 + ... + 4748283.

It is an arithmetic number, because the mean of its divisors is an integer number (16169832910).

Almost surely, 2^321011220231 is an apocalyptic number.

321011220231 is a deficient number, since it is larger than the sum of its proper divisors (196423432889).

321011220231 is a wasteful number, since it uses less digits than its factorization.

321011220231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9428592 (or 9428586 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 321011220231 its reverse (132022110123), we get a palindrome (453033330354).

The spelling of 321011220231 in words is "three hundred twenty-one billion, eleven million, two hundred twenty thousand, two hundred thirty-one".