1231203131313 has 16 divisors (see below), whose sum is σ = 1682601854016. Its totient is φ = 800545838400.

The previous prime is 1231203131311. The next prime is 1231203131341. The reversal of 1231203131313 is 3131313021321.

It is not a de Polignac number, because 1231203131313 - 2¹ = 1231203131311 is a prime.

It is a super-2 number, since 2×1231203131313² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231203131311) 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, 30303406 + ... + 30344007.

It is an arithmetic number, because the mean of its divisors is an integer number (105162615876).

Almost surely, 2^{1231203131313} is an apocalyptic number.

It is an amenable number.

1231203131313 is a deficient number, since it is larger than the sum of its proper divisors (451398722703).

1231203131313 is a wasteful number, since it uses less digits than its factorization.

1231203131313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60647584.

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

Adding to 1231203131313 its reverse (3131313021321), we get a palindrome (4362516152634).

The spelling of 1231203131313 in words is "one trillion, two hundred thirty-one billion, two hundred three million, one hundred thirty-one thousand, three hundred thirteen".