11204552521 has 4 divisors (see below), whose sum is σ = 11292777472. Its totient is φ = 11116327572.

The previous prime is 11204552483. The next prime is 11204552537. The reversal of 11204552521 is 12525540211.

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 a de Polignac number, because none of the positive numbers 2^k-11204552521 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 11204552521.

It is not an unprimeable number, because it can be changed into a prime (11204552581) 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, 44112285 + ... + 44112538.

It is an arithmetic number, because the mean of its divisors is an integer number (2823194368).

Almost surely, 2^11204552521 is an apocalyptic number.

It is an amenable number.

11204552521 is a deficient number, since it is larger than the sum of its proper divisors (88224951).

11204552521 is an equidigital number, since it uses as much as digits as its factorization.

11204552521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88224950.

The product of its (nonzero) digits is 4000, while the sum is 28.

The spelling of 11204552521 in words is "eleven billion, two hundred four million, five hundred fifty-two thousand, five hundred twenty-one".