231131321122 has 32 divisors (see below), whose sum is σ = 399242907504. Its totient is φ = 99406848000.

The previous prime is 231131321117. The next prime is 231131321143. The reversal of 231131321122 is 221123131132.

It can be written as a sum of positive squares in 8 ways, for example, as 213324820641 + 17806500481 = 461871^2 + 133441^2 .

It is a junction number, because it is equal to n+sod(n) for n = 231131321093 and 231131321102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2544079 + ... + 2633362.

Almost surely, 2^231131321122 is an apocalyptic number.

231131321122 is a deficient number, since it is larger than the sum of its proper divisors (168111586382).

231131321122 is a wasteful number, since it uses less digits than its factorization.

231131321122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5177574.

The product of its digits is 432, while the sum is 22.

Adding to 231131321122 its reverse (221123131132), we get a palindrome (452254452254).

The spelling of 231131321122 in words is "two hundred thirty-one billion, one hundred thirty-one million, three hundred twenty-one thousand, one hundred twenty-two".