31203313131012 has 48 divisors (see below), whose sum is σ = 80432015462400. Its totient is φ = 9335858931360.

The previous prime is 31203313130947. The next prime is 31203313131013. The reversal of 31203313131012 is 21013131330213.

It is a super-2 number, since 2×31203313131012² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31203313131013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1496120812 + ... + 1496141667.

It is an arithmetic number, because the mean of its divisors is an integer number (1675666988800).

Almost surely, 2^{31203313131012} is an apocalyptic number.

It is an amenable number.

31203313131012 is an abundant number, since it is smaller than the sum of its proper divisors (49228702331388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31203313131012 is a wasteful number, since it uses less digits than its factorization.

31203313131012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2992262576 (or 2992262574 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 31203313131012 its reverse (21013131330213), we get a palindrome (52216444461225).

The spelling of 31203313131012 in words is "thirty-one trillion, two hundred three billion, three hundred thirteen million, one hundred thirty-one thousand, twelve".