1312031101 has 2 divisors, whose sum is σ = 1312031102. Its totient is φ = 1312031100.

The previous prime is 1312031087. The next prime is 1312031141. The reversal of 1312031101 is 1011302131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1305087876 + 6943225 = 36126^2 + 2635^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312031101 - 2⁹ = 1312030589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312031141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656015550 + 656015551.

It is an arithmetic number, because the mean of its divisors is an integer number (656015551).

Almost surely, 2^1312031101 is an apocalyptic number.

It is an amenable number.

1312031101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312031101 is an equidigital number, since it uses as much as digits as its factorization.

1312031101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1312031101 is about 36221.9698663670. The cubic root of 1312031101 is about 1094.7493851788.

Adding to 1312031101 its reverse (1011302131), we get a palindrome (2323333232).

The spelling of 1312031101 in words is "one billion, three hundred twelve million, thirty-one thousand, one hundred one".