11192725721 has 4 divisors (see below), whose sum is σ = 11453021712. Its totient is φ = 10932429732.

The previous prime is 11192725703. The next prime is 11192725757. The reversal of 11192725721 is 12752729111.

11192725721 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 a de Polignac number, because none of the positive numbers 2^k-11192725721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11192725771) 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, 130147931 + ... + 130148016.

It is an arithmetic number, because the mean of its divisors is an integer number (2863255428).

Almost surely, 2^11192725721 is an apocalyptic number.

It is an amenable number.

11192725721 is a deficient number, since it is larger than the sum of its proper divisors (260295991).

11192725721 is an equidigital number, since it uses as much as digits as its factorization.

11192725721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260295990.

The product of its digits is 17640, while the sum is 38.

The spelling of 11192725721 in words is "eleven billion, one hundred ninety-two million, seven hundred twenty-five thousand, seven hundred twenty-one".