1312012311121 has 12 divisors (see below), whose sum is σ = 1381279393728. Its totient is φ = 1243862105024.

The previous prime is 1312012311101. The next prime is 1312012311161. The reversal of 1312012311121 is 1211132102131.

It is not a de Polignac number, because 1312012311121 - 2¹¹ = 1312012309073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312012311101) 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, 1940005 + ... + 2527378.

It is an arithmetic number, because the mean of its divisors is an integer number (115106616144).

Almost surely, 2^{1312012311121} is an apocalyptic number.

It is an amenable number.

1312012311121 is a deficient number, since it is larger than the sum of its proper divisors (69267082607).

1312012311121 is an equidigital number, since it uses as much as digits as its factorization.

1312012311121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4467632 (or 4467519 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1312012311121 its reverse (1211132102131), we get a palindrome (2523144413252).

The spelling of 1312012311121 in words is "one trillion, three hundred twelve billion, twelve million, three hundred eleven thousand, one hundred twenty-one".