125200310121 has 20 divisors (see below), whose sum is σ = 187060021632. Its totient is φ = 83452414968.

The previous prime is 125200310099. The next prime is 125200310143. The reversal of 125200310121 is 121013002521.

125200310121 is a `hidden beast` number, since 12 + 520 + 0 + 3 + 10 + 121 = 666.

It is an interprime number because it is at equal distance from previous prime (125200310099) and next prime (125200310143).

It is not a de Polignac number, because 125200310121 - 2¹⁵ = 125200277353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125200310094 and 125200310103.

It is not an unprimeable number, because it can be changed into a prime (125200310021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 347220 + ... + 609066.

Almost surely, 2^125200310121 is an apocalyptic number.

It is an amenable number.

125200310121 is a deficient number, since it is larger than the sum of its proper divisors (61859711511).

125200310121 is an equidigital number, since it uses as much as digits as its factorization.

125200310121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267762 (or 267753 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 125200310121 its reverse (121013002521), we get a palindrome (246213312642).

The spelling of 125200310121 in words is "one hundred twenty-five billion, two hundred million, three hundred ten thousand, one hundred twenty-one".