525105000121 has 4 divisors (see below), whose sum is σ = 565497692452. Its totient is φ = 484712307792.

The previous prime is 525105000059. The next prime is 525105000131. The reversal of 525105000121 is 121000501525.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 217785555625 + 307319444496 = 466675^2 + 554364^2 .

It is a cyclic number.

It is not a de Polignac number, because 525105000121 - 2¹¹ = 525104998073 is a prime.

It is a super-2 number, since 2×525105000121² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 525105000092 and 525105000101.

It is not an unprimeable number, because it can be changed into a prime (525105000131) 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, 20196346146 + ... + 20196346171.

It is an arithmetic number, because the mean of its divisors is an integer number (141374423113).

Almost surely, 2^525105000121 is an apocalyptic number.

It is an amenable number.

525105000121 is a deficient number, since it is larger than the sum of its proper divisors (40392692331).

525105000121 is a wasteful number, since it uses less digits than its factorization.

525105000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40392692330.

The product of its (nonzero) digits is 500, while the sum is 22.

Adding to 525105000121 its reverse (121000501525), we get a palindrome (646105501646).

The spelling of 525105000121 in words is "five hundred twenty-five billion, one hundred five million, one hundred twenty-one", and thus it is an aban number.