131231013002 has 16 divisors (see below), whose sum is σ = 200090709000. Its totient is φ = 64534295040.

The previous prime is 131231012993. The next prime is 131231013007. The reversal of 131231013002 is 200310132131.

It can be written as a sum of positive squares in 4 ways, for example, as 8828293681 + 122402719321 = 93959^2 + 349861^2 .

It is not an unprimeable number, because it can be changed into a prime (131231013007) 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, 1625774 + ... + 1704582.

Almost surely, 2^131231013002 is an apocalyptic number.

131231013002 is a deficient number, since it is larger than the sum of its proper divisors (68859695998).

131231013002 is a wasteful number, since it uses less digits than its factorization.

131231013002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92521.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 131231013002 its reverse (200310132131), we get a palindrome (331541145133).

The spelling of 131231013002 in words is "one hundred thirty-one billion, two hundred thirty-one million, thirteen thousand, two".