525204512121 has 4 divisors (see below), whose sum is σ = 700272682832. Its totient is φ = 350136341412.

The previous prime is 525204512083. The next prime is 525204512143. The reversal of 525204512121 is 121215402525.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 525204512121 - 2²¹ = 525202414969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525204512821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87534085351 + ... + 87534085356.

It is an arithmetic number, because the mean of its divisors is an integer number (175068170708).

Almost surely, 2^525204512121 is an apocalyptic number.

It is an amenable number.

525204512121 is a deficient number, since it is larger than the sum of its proper divisors (175068170711).

525204512121 is a wasteful number, since it uses less digits than its factorization.

525204512121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175068170710.

The product of its (nonzero) digits is 8000, while the sum is 30.

Adding to 525204512121 its reverse (121215402525), we get a palindrome (646419914646).

The spelling of 525204512121 in words is "five hundred twenty-five billion, two hundred four million, five hundred twelve thousand, one hundred twenty-one".