125131320001 has 4 divisors (see below), whose sum is σ = 125161556400. Its totient is φ = 125101083604.

The previous prime is 125131319981. The next prime is 125131320019. The reversal of 125131320001 is 100023131521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100023131521 = 8933 ⋅11197037.

It is a cyclic number.

It is not a de Polignac number, because 125131320001 - 2²³ = 125122931393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125131321001) 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, 15111991 + ... + 15120268.

It is an arithmetic number, because the mean of its divisors is an integer number (31290389100).

Almost surely, 2^125131320001 is an apocalyptic number.

It is an amenable number.

125131320001 is a deficient number, since it is larger than the sum of its proper divisors (30236399).

125131320001 is an equidigital number, since it uses as much as digits as its factorization.

125131320001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30236398.

The product of its (nonzero) digits is 180, while the sum is 19.

Adding to 125131320001 its reverse (100023131521), we get a palindrome (225154451522).

The spelling of 125131320001 in words is "one hundred twenty-five billion, one hundred thirty-one million, three hundred twenty thousand, one".