31311323122 has 4 divisors (see below), whose sum is σ = 46966984686. Its totient is φ = 15655661560.

The previous prime is 31311323101. The next prime is 31311323137. The reversal of 31311323122 is 22132311313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24983279721 + 6328043401 = 158061^2 + 79549^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31311323093 and 31311323102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7827830779 + ... + 7827830782.

Almost surely, 2^31311323122 is an apocalyptic number.

31311323122 is a deficient number, since it is larger than the sum of its proper divisors (15655661564).

31311323122 is a wasteful number, since it uses less digits than its factorization.

31311323122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15655661563.

The product of its digits is 648, while the sum is 22.

Adding to 31311323122 its reverse (22132311313), we get a palindrome (53443634435).

The spelling of 31311323122 in words is "thirty-one billion, three hundred eleven million, three hundred twenty-three thousand, one hundred twenty-two".