125221424122521 has 24 divisors (see below), whose sum is σ = 182667231774144. Its totient is φ = 82653954717600.

The previous prime is 125221424122489. The next prime is 125221424122579.

125221424122521 is a `hidden beast` number, since 1 + 2 + 5 + 2 + 2 + 1 + 4 + 2 + 4 + 122 + 521 = 666.

125221424122521 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 125221424122521 - 2⁵ = 125221424122489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125221424162521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 289161060 + ... + 289593786.

It is an arithmetic number, because the mean of its divisors is an integer number (7611134657256).

Almost surely, 2^{125221424122521} is an apocalyptic number.

It is an amenable number.

125221424122521 is a deficient number, since it is larger than the sum of its proper divisors (57445807651623).

125221424122521 is a wasteful number, since it uses less digits than its factorization.

125221424122521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751181 (or 751178 counting only the distinct ones).

The product of its digits is 51200, while the sum is 36.

The spelling of 125221424122521 in words is "one hundred twenty-five trillion, two hundred twenty-one billion, four hundred twenty-four million, one hundred twenty-two thousand, five hundred twenty-one".