125200540521 has 24 divisors (see below), whose sum is σ = 207111790080. Its totient is φ = 71393789376.

The previous prime is 125200540499. The next prime is 125200540573. The reversal of 125200540521 is 125045002521.

125200540521 is a `hidden beast` number, since 1 + 252 + 0 + 0 + 5 + 405 + 2 + 1 = 666.

It is not a de Polignac number, because 125200540521 - 2¹¹ = 125200538473 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125200545521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2044260 + ... + 2104613.

It is an arithmetic number, because the mean of its divisors is an integer number (8629657920).

Almost surely, 2^125200540521 is an apocalyptic number.

It is an amenable number.

125200540521 is a deficient number, since it is larger than the sum of its proper divisors (81911249559).

125200540521 is a wasteful number, since it uses less digits than its factorization.

125200540521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4149365 (or 4149362 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The spelling of 125200540521 in words is "one hundred twenty-five billion, two hundred million, five hundred forty thousand, five hundred twenty-one".