1231302123013 has 12 divisors (see below), whose sum is σ = 1316361225088. Its totient is φ = 1150493616720.

The previous prime is 1231302123001. The next prime is 1231302123041. The reversal of 1231302123013 is 3103212031321.

It is a de Polignac number, because none of the positive numbers 2^k-1231302123013 is a prime.

It is a super-2 number, since 2×1231302123013² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231302121013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23588331 + ... + 23640472.

Almost surely, 2^{1231302123013} is an apocalyptic number.

It is an amenable number.

1231302123013 is a deficient number, since it is larger than the sum of its proper divisors (85059102075).

1231302123013 is an equidigital number, since it uses as much as digits as its factorization.

1231302123013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47228892 (or 47228863 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1231302123013 its reverse (3103212031321), we get a palindrome (4334514154334).

The spelling of 1231302123013 in words is "one trillion, two hundred thirty-one billion, three hundred two million, one hundred twenty-three thousand, thirteen".