131252122423501 has 4 divisors (see below), whose sum is σ = 131284764089404. Its totient is φ = 131219480757600.

The previous prime is 131252122423469. The next prime is 131252122423511. The reversal of 131252122423501 is 105324221252131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2555553932100 + 128696568491401 = 1598610^2 + 11344451^2 .

It is a cyclic number.

It is not a de Polignac number, because 131252122423501 - 2⁵ = 131252122423469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131252122423511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16320826920 + ... + 16320834961.

It is an arithmetic number, because the mean of its divisors is an integer number (32821191022351).

Almost surely, 2^{131252122423501} is an apocalyptic number.

It is an amenable number.

131252122423501 is a deficient number, since it is larger than the sum of its proper divisors (32641665903).

131252122423501 is an equidigital number, since it uses as much as digits as its factorization.

131252122423501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32641665902.

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 131252122423501 its reverse (105324221252131), we get a palindrome (236576343675632).

The spelling of 131252122423501 in words is "one hundred thirty-one trillion, two hundred fifty-two billion, one hundred twenty-two million, four hundred twenty-three thousand, five hundred one".