113204522521 has 4 divisors (see below), whose sum is σ = 116856281344. Its totient is φ = 109552763700.

The previous prime is 113204522507. The next prime is 113204522527. The reversal of 113204522521 is 125225402311.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 113204522521 - 2⁷ = 113204522393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 113204522521.

It is not an unprimeable number, because it can be changed into a prime (113204522527) 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, 1825879365 + ... + 1825879426.

It is an arithmetic number, because the mean of its divisors is an integer number (29214070336).

Almost surely, 2^113204522521 is an apocalyptic number.

It is an amenable number.

113204522521 is a deficient number, since it is larger than the sum of its proper divisors (3651758823).

113204522521 is an equidigital number, since it uses as much as digits as its factorization.

113204522521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3651758822.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 113204522521 its reverse (125225402311), we get a palindrome (238429924832).

The spelling of 113204522521 in words is "one hundred thirteen billion, two hundred four million, five hundred twenty-two thousand, five hundred twenty-one".