231312001122 has 48 divisors (see below), whose sum is σ = 515944541112. Its totient is φ = 74841822720.

The previous prime is 231312001111. The next prime is 231312001127. The reversal of 231312001122 is 221100213132.

231312001122 is a `hidden beast` number, since 231 + 312 + 0 + 0 + 1 + 122 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 125777331801 + 105534669321 = 354651^2 + 324861^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 231312001095 and 231312001104.

It is not an unprimeable number, because it can be changed into a prime (231312001127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132103 + ... + 692874.

Almost surely, 2^231312001122 is an apocalyptic number.

231312001122 is an abundant number, since it is smaller than the sum of its proper divisors (284632539990).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231312001122 is a wasteful number, since it uses less digits than its factorization.

231312001122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825443 (or 825440 counting only the distinct ones).

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

Adding to 231312001122 its reverse (221100213132), we get a palindrome (452412214254).

The spelling of 231312001122 in words is "two hundred thirty-one billion, three hundred twelve million, one thousand, one hundred twenty-two".