131011125461 has 2 divisors, whose sum is σ = 131011125462. Its totient is φ = 131011125460.

The previous prime is 131011125451. The next prime is 131011125499. The reversal of 131011125461 is 164521110131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128873820100 + 2137305361 = 358990^2 + 46231^2 .

It is a cyclic number.

It is not a de Polignac number, because 131011125461 - 2²² = 131006931157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131011125461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131011125451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65505562730 + 65505562731.

It is an arithmetic number, because the mean of its divisors is an integer number (65505562731).

Almost surely, 2^131011125461 is an apocalyptic number.

It is an amenable number.

131011125461 is a deficient number, since it is larger than the sum of its proper divisors (1).

131011125461 is an equidigital number, since it uses as much as digits as its factorization.

131011125461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 26.

Adding to 131011125461 its reverse (164521110131), we get a palindrome (295532235592).

The spelling of 131011125461 in words is "one hundred thirty-one billion, eleven million, one hundred twenty-five thousand, four hundred sixty-one".