1312012133 has 2 divisors, whose sum is σ = 1312012134. Its totient is φ = 1312012132.

The previous prime is 1312012129. The next prime is 1312012139. The reversal of 1312012133 is 3312102131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1027010209 + 285001924 = 32047^2 + 16882^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312012133 - 2² = 1312012129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312012139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656006066 + 656006067.

It is an arithmetic number, because the mean of its divisors is an integer number (656006067).

Almost surely, 2^1312012133 is an apocalyptic number.

It is an amenable number.

1312012133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312012133 is an equidigital number, since it uses as much as digits as its factorization.

1312012133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1312012133 is about 36221.7080353757. The cubic root of 1312012133 is about 1094.7441095655.

Adding to 1312012133 its reverse (3312102131), we get a palindrome (4624114264).

The spelling of 1312012133 in words is "one billion, three hundred twelve million, twelve thousand, one hundred thirty-three".