31120442131 has 8 divisors (see below), whose sum is σ = 33034063680. Its totient is φ = 29216043648.

The previous prime is 31120442107. The next prime is 31120442141. The reversal of 31120442131 is 13124402113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31120442131 - 2⁹ = 31120441619 is a prime.

It is a super-2 number, since 2×31120442131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31120442141) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2298811 + ... + 2312308.

It is an arithmetic number, because the mean of its divisors is an integer number (4129257960).

Almost surely, 2^31120442131 is an apocalyptic number.

31120442131 is a deficient number, since it is larger than the sum of its proper divisors (1913621549).

31120442131 is a wasteful number, since it uses less digits than its factorization.

31120442131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4611533.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 31120442131 its reverse (13124402113), we get a palindrome (44244844244).

The spelling of 31120442131 in words is "thirty-one billion, one hundred twenty million, four hundred forty-two thousand, one hundred thirty-one".