31012122131 has 8 divisors (see below), whose sum is σ = 31932179760. Its totient is φ = 30096374688.

The previous prime is 31012122079. The next prime is 31012122161. The reversal of 31012122131 is 13122121013.

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 31012122131 - 2⁶ = 31012122067 is a prime.

It is a super-2 number, since 2×31012122131² (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 (31012122161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1062941 + ... + 1091726.

It is an arithmetic number, because the mean of its divisors is an integer number (3991522470).

Almost surely, 2^31012122131 is an apocalyptic number.

31012122131 is a deficient number, since it is larger than the sum of its proper divisors (920057629).

31012122131 is a wasteful number, since it uses less digits than its factorization.

31012122131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2155093.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31012122131 its reverse (13122121013), we get a palindrome (44134243144).

The spelling of 31012122131 in words is "thirty-one billion, twelve million, one hundred twenty-two thousand, one hundred thirty-one".