31120311131 has 16 divisors (see below), whose sum is σ = 38786764800. Its totient is φ = 24310978848.

The previous prime is 31120311119. The next prime is 31120311203. The reversal of 31120311131 is 13111302113.

It is not a de Polignac number, because 31120311131 - 2¹⁴ = 31120294747 is a prime.

It is a super-2 number, since 2×31120311131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31120311331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2157251 + ... + 2171628.

It is an arithmetic number, because the mean of its divisors is an integer number (2424172800).

Almost surely, 2^31120311131 is an apocalyptic number.

31120311131 is a deficient number, since it is larger than the sum of its proper divisors (7666453669).

31120311131 is a wasteful number, since it uses less digits than its factorization.

31120311131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4328978.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 31120311131 its reverse (13111302113), we get a palindrome (44231613244).

The spelling of 31120311131 in words is "thirty-one billion, one hundred twenty million, three hundred eleven thousand, one hundred thirty-one".