125213324121 has 32 divisors (see below), whose sum is σ = 186420864000. Its totient is φ = 83062070784.

The previous prime is 125213324111. The next prime is 125213324149. The reversal of 125213324121 is 121423312521.

It is a happy number.

125213324121 is a `hidden beast` number, since 1 + 2 + 5 + 213 + 32 + 412 + 1 = 666.

It is not a de Polignac number, because 125213324121 - 2¹⁵ = 125213291353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (125213324111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18715945 + ... + 18722633.

It is an arithmetic number, because the mean of its divisors is an integer number (5825652000).

Almost surely, 2^125213324121 is an apocalyptic number.

It is an amenable number.

125213324121 is a deficient number, since it is larger than the sum of its proper divisors (61207539879).

125213324121 is a wasteful number, since it uses less digits than its factorization.

125213324121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10030 (or 10024 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

Adding to 125213324121 its reverse (121423312521), we get a palindrome (246636636642).

The spelling of 125213324121 in words is "one hundred twenty-five billion, two hundred thirteen million, three hundred twenty-four thousand, one hundred twenty-one".