131312311061 has 2 divisors, whose sum is σ = 131312311062. Its totient is φ = 131312311060.

The previous prime is 131312311049. The next prime is 131312311129. The reversal of 131312311061 is 160113213131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91996956100 + 39315354961 = 303310^2 + 198281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131312311061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131312311661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65656155530 + 65656155531.

It is an arithmetic number, because the mean of its divisors is an integer number (65656155531).

Almost surely, 2^131312311061 is an apocalyptic number.

It is an amenable number.

131312311061 is a deficient number, since it is larger than the sum of its proper divisors (1).

131312311061 is an equidigital number, since it uses as much as digits as its factorization.

131312311061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 131312311061 its reverse (160113213131), we get a palindrome (291425524192).

The spelling of 131312311061 in words is "one hundred thirty-one billion, three hundred twelve million, three hundred eleven thousand, sixty-one".