11056506721 has 8 divisors (see below), whose sum is σ = 12108821760. Its totient is φ = 10033022352.

The previous prime is 11056506691. The next prime is 11056506731. The reversal of 11056506721 is 12760565011.

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 11056506721 - 2⁵ = 11056506689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11056506731) 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, 7206865 + ... + 7208398.

It is an arithmetic number, because the mean of its divisors is an integer number (1513602720).

Almost surely, 2^11056506721 is an apocalyptic number.

It is an amenable number.

11056506721 is a deficient number, since it is larger than the sum of its proper divisors (1052315039).

11056506721 is a wasteful number, since it uses less digits than its factorization.

11056506721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14415335.

The product of its (nonzero) digits is 12600, while the sum is 34.

The spelling of 11056506721 in words is "eleven billion, fifty-six million, five hundred six thousand, seven hundred twenty-one".