11239488721 has 8 divisors (see below), whose sum is σ = 11411969984. Its totient is φ = 11067146640.

The previous prime is 11239488719. The next prime is 11239488751. The reversal of 11239488721 is 12788493211.

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

It is a cyclic number.

It is not a de Polignac number, because 11239488721 - 2¹ = 11239488719 is a prime.

It is a super-2 number, since 2×11239488721² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11239488751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134191 + ... + 201211.

It is an arithmetic number, because the mean of its divisors is an integer number (1426496248).

Almost surely, 2^11239488721 is an apocalyptic number.

It is an amenable number.

11239488721 is a deficient number, since it is larger than the sum of its proper divisors (172481263).

11239488721 is an equidigital number, since it uses as much as digits as its factorization.

11239488721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69591.

The product of its digits is 193536, while the sum is 46.

The spelling of 11239488721 in words is "eleven billion, two hundred thirty-nine million, four hundred eighty-eight thousand, seven hundred twenty-one".