125215621133 has 4 divisors (see below), whose sum is σ = 125218223868. Its totient is φ = 125213018400.

The previous prime is 125215621081. The next prime is 125215621159. The reversal of 125215621133 is 331126512521.

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 12224176969 + 112991444164 = 110563^2 + 336142^2 .

It is a cyclic number.

It is not a de Polignac number, because 125215621133 - 2⁸ = 125215620877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125215621133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125215621163) 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, 1227818 + ... + 1325883.

It is an arithmetic number, because the mean of its divisors is an integer number (31304555967).

Almost surely, 2^125215621133 is an apocalyptic number.

It is an amenable number.

125215621133 is a deficient number, since it is larger than the sum of its proper divisors (2602735).

125215621133 is an equidigital number, since it uses as much as digits as its factorization.

125215621133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2602734.

The product of its digits is 10800, while the sum is 32.

The spelling of 125215621133 in words is "one hundred twenty-five billion, two hundred fifteen million, six hundred twenty-one thousand, one hundred thirty-three".