131231012 has 48 divisors (see below), whose sum is σ = 258720000. Its totient is φ = 57728160.

The previous prime is 131230999. The next prime is 131231027. The reversal of 131231012 is 210132131.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262739 + ... + 263237.

It is an arithmetic number, because the mean of its divisors is an integer number (5390000).

Almost surely, 2^131231012 is an apocalyptic number.

It is an amenable number.

131231012 is a deficient number, since it is larger than the sum of its proper divisors (127488988).

131231012 is a wasteful number, since it uses less digits than its factorization.

131231012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696 (or 694 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 131231012 is about 11455.6105031552. The cubic root of 131231012 is about 508.1736701347.

Adding to 131231012 its reverse (210132131), we get a palindrome (341363143).

The spelling of 131231012 in words is "one hundred thirty-one million, two hundred thirty-one thousand, twelve".