31120131133 has 24 divisors (see below), whose sum is σ = 41278947192. Its totient is φ = 23174129664.

The previous prime is 31120131089. The next prime is 31120131157. The reversal of 31120131133 is 33113102113.

It can be written as a sum of positive squares in 4 ways, for example, as 247181284 + 30872949849 = 15722^2 + 175707^2 .

It is not a de Polignac number, because 31120131133 - 2¹⁷ = 31120000061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31120131133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120131233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1426060 + ... + 1447717.

It is an arithmetic number, because the mean of its divisors is an integer number (1719956133).

Almost surely, 2^31120131133 is an apocalyptic number.

It is an amenable number.

31120131133 is a deficient number, since it is larger than the sum of its proper divisors (10158816059).

31120131133 is a wasteful number, since it uses less digits than its factorization.

31120131133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2873821 (or 2873814 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31120131133 its reverse (33113102113), we get a palindrome (64233233246).

The spelling of 31120131133 in words is "thirty-one billion, one hundred twenty million, one hundred thirty-one thousand, one hundred thirty-three".