75121133252 has 18 divisors (see below), whose sum is σ = 144499536174. Its totient is φ = 34145969440.

The previous prime is 75121133239. The next prime is 75121133261. The reversal of 75121133252 is 25233112157.

It can be written as a sum of positive squares in only one way, i.e., 74864620996 + 256512256 = 273614^2 + 16016^2 .

It is a super-2 number, since 2×75121133252² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 77603993 + ... + 77604960.

Almost surely, 2^75121133252 is an apocalyptic number.

It is an amenable number.

75121133252 is a deficient number, since it is larger than the sum of its proper divisors (69378402922).

75121133252 is a wasteful number, since it uses less digits than its factorization.

75121133252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155208979 (or 155208966 counting only the distinct ones).

The product of its digits is 12600, while the sum is 32.

The spelling of 75121133252 in words is "seventy-five billion, one hundred twenty-one million, one hundred thirty-three thousand, two hundred fifty-two".