11504553121 has 4 divisors (see below), whose sum is σ = 11772100912. Its totient is φ = 11237005332.

The previous prime is 11504553113. The next prime is 11504553133. The reversal of 11504553121 is 12135540511.

11504553121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11504553121 - 2³ = 11504553113 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 11504553121.

It is not an unprimeable number, because it can be changed into a prime (11504553101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133773831 + ... + 133773916.

It is an arithmetic number, because the mean of its divisors is an integer number (2943025228).

Almost surely, 2^11504553121 is an apocalyptic number.

It is an amenable number.

11504553121 is a deficient number, since it is larger than the sum of its proper divisors (267547791).

11504553121 is an equidigital number, since it uses as much as digits as its factorization.

11504553121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267547790.

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 11504553121 in words is "eleven billion, five hundred four million, five hundred fifty-three thousand, one hundred twenty-one".