11043608721 has 8 divisors (see below), whose sum is σ = 14725591200. Its totient is φ = 7362016032.

The previous prime is 11043608711. The next prime is 11043608743. The reversal of 11043608721 is 12780634011.

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

It is not a de Polignac number, because 11043608721 - 2¹⁴ = 11043592337 is a prime.

It is a super-2 number, since 2×11043608721² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11043608711) 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, 23271 + ... + 150428.

It is an arithmetic number, because the mean of its divisors is an integer number (1840698900).

Almost surely, 2^11043608721 is an apocalyptic number.

It is an amenable number.

11043608721 is a deficient number, since it is larger than the sum of its proper divisors (3681982479).

11043608721 is a wasteful number, since it uses less digits than its factorization.

11043608721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194895.

The product of its (nonzero) digits is 8064, while the sum is 33.

The spelling of 11043608721 in words is "eleven billion, forty-three million, six hundred eight thousand, seven hundred twenty-one".