131619873014821 has 2 divisors, whose sum is σ = 131619873014822. Its totient is φ = 131619873014820.

The previous prime is 131619873014809. The next prime is 131619873014899. The reversal of 131619873014821 is 128410378916131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126312198876900 + 5307674137921 = 11238870^2 + 2303839^2 .

It is a cyclic number.

It is not a de Polignac number, because 131619873014821 - 2⁹ = 131619873014309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131619873012821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65809936507410 + 65809936507411.

It is an arithmetic number, because the mean of its divisors is an integer number (65809936507411).

Almost surely, 2^{131619873014821} is an apocalyptic number.

It is an amenable number.

131619873014821 is a deficient number, since it is larger than the sum of its proper divisors (1).

131619873014821 is an equidigital number, since it uses as much as digits as its factorization.

131619873014821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 55.

The spelling of 131619873014821 in words is "one hundred thirty-one trillion, six hundred nineteen billion, eight hundred seventy-three million, fourteen thousand, eight hundred twenty-one".