31131020000002 has 8 divisors (see below), whose sum is σ = 50288570769276. Its totient is φ = 14368163076912.

The previous prime is 31131019999993. The next prime is 31131020000039. The reversal of 31131020000002 is 20000002013113.

It can be written as a sum of positive squares in 2 ways, for example, as 30381581778601 + 749438221401 = 5511949^2 + 865701^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 598673461513 + ... + 598673461564.

Almost surely, 2^{31131020000002} is an apocalyptic number.

31131020000002 is a deficient number, since it is larger than the sum of its proper divisors (19157550769274).

31131020000002 is a wasteful number, since it uses less digits than its factorization.

31131020000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197346923092.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31131020000002 its reverse (20000002013113), we get a palindrome (51131022013115).

The spelling of 31131020000002 in words is "thirty-one trillion, one hundred thirty-one billion, twenty million, two", and thus it is an aban number.