31012111131 has 8 divisors (see below), whose sum is σ = 41353975824. Its totient is φ = 20672493600.

The previous prime is 31012111099. The next prime is 31012111133. The reversal of 31012111131 is 13111121013.

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

It is not a de Polignac number, because 31012111131 - 2⁵ = 31012111099 is a prime.

It is a super-2 number, since 2×31012111131² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31012111131.

It is not an unprimeable number, because it can be changed into a prime (31012111133) 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, 529320 + ... + 584981.

It is an arithmetic number, because the mean of its divisors is an integer number (5169246978).

Almost surely, 2^31012111131 is an apocalyptic number.

31012111131 is a deficient number, since it is larger than the sum of its proper divisors (10341864693).

31012111131 is a wasteful number, since it uses less digits than its factorization.

31012111131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123581.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 31012111131 its reverse (13111121013), we get a palindrome (44123232144).

The spelling of 31012111131 in words is "thirty-one billion, twelve million, one hundred eleven thousand, one hundred thirty-one".