12521113522 has 8 divisors (see below), whose sum is σ = 18828508572. Its totient is φ = 6244944000.

The previous prime is 12521113511. The next prime is 12521113523. The reversal of 12521113522 is 22531112521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9668592241 + 2852521281 = 98329^2 + 53409^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12521113522² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12521113523) 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, 7805379 + ... + 7806982.

Almost surely, 2^12521113522 is an apocalyptic number.

12521113522 is a deficient number, since it is larger than the sum of its proper divisors (6307395050).

12521113522 is a wasteful number, since it uses less digits than its factorization.

12521113522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15612764.

The product of its digits is 1200, while the sum is 25.

The spelling of 12521113522 in words is "twelve billion, five hundred twenty-one million, one hundred thirteen thousand, five hundred twenty-two".