31130222120 has 16 divisors (see below), whose sum is σ = 70042999860. Its totient is φ = 12452088832.

The previous prime is 31130222107. The next prime is 31130222147. The reversal of 31130222120 is 2122203113.

It can be written as a sum of positive squares in 2 ways, for example, as 29166491524 + 1963730596 = 170782^2 + 44314^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389127737 + ... + 389127816.

Almost surely, 2^31130222120 is an apocalyptic number.

It is an amenable number.

31130222120 is an abundant number, since it is smaller than the sum of its proper divisors (38912777740).

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

31130222120 is a wasteful number, since it uses less digits than its factorization.

31130222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778255564 (or 778255560 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31130222120 its reverse (2122203113), we get a palindrome (33252425233).

The spelling of 31130222120 in words is "thirty-one billion, one hundred thirty million, two hundred twenty-two thousand, one hundred twenty".