11053465721 has 4 divisors (see below), whose sum is σ = 11262021732. Its totient is φ = 10844909712.

The previous prime is 11053465597. The next prime is 11053465733. The reversal of 11053465721 is 12756435011.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7463059321 + 3590406400 = 86389^2 + 59920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11053465721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11053465771) 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, 104277926 + ... + 104278031.

It is an arithmetic number, because the mean of its divisors is an integer number (2815505433).

Almost surely, 2^11053465721 is an apocalyptic number.

It is an amenable number.

11053465721 is a deficient number, since it is larger than the sum of its proper divisors (208556011).

11053465721 is an equidigital number, since it uses as much as digits as its factorization.

11053465721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208556010.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 11053465721 in words is "eleven billion, fifty-three million, four hundred sixty-five thousand, seven hundred twenty-one".