125211919897 has 4 divisors (see below), whose sum is σ = 125213630976. Its totient is φ = 125210208820.

The previous prime is 125211919871. The next prime is 125211919907. The reversal of 125211919897 is 798919112521.

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.

It is a cyclic number.

It is not a de Polignac number, because 125211919897 - 2²³ = 125203531289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125211919097) 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, 740629 + ... + 893842.

It is an arithmetic number, because the mean of its divisors is an integer number (31303407744).

Almost surely, 2^125211919897 is an apocalyptic number.

It is an amenable number.

125211919897 is a deficient number, since it is larger than the sum of its proper divisors (1711079).

125211919897 is an equidigital number, since it uses as much as digits as its factorization.

125211919897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1711078.

The product of its digits is 816480, while the sum is 55.

The spelling of 125211919897 in words is "one hundred twenty-five billion, two hundred eleven million, nine hundred nineteen thousand, eight hundred ninety-seven".