1231020020313 has 48 divisors (see below), whose sum is σ = 1839648907200. Its totient is φ = 792831473280.

The previous prime is 1231020020309. The next prime is 1231020020339. The reversal of 1231020020313 is 3130200201321.

1231020020313 is a `hidden beast` number, since 1 + 2 + 310 + 20 + 0 + 20 + 313 = 666.

It is not a de Polignac number, because 1231020020313 - 2² = 1231020020309 is a prime.

It is a super-2 number, since 2×1231020020313² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231020020303) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14936823 + ... + 15019011.

It is an arithmetic number, because the mean of its divisors is an integer number (38326018900).

Almost surely, 2^{1231020020313} is an apocalyptic number.

It is an amenable number.

1231020020313 is a deficient number, since it is larger than the sum of its proper divisors (608628886887).

1231020020313 is a wasteful number, since it uses less digits than its factorization.

1231020020313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82742 (or 82739 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 1231020020313 its reverse (3130200201321), we get a palindrome (4361220221634).

The spelling of 1231020020313 in words is "one trillion, two hundred thirty-one billion, twenty million, twenty thousand, three hundred thirteen".