11056120171521 has 64 divisors (see below), whose sum is σ = 16095210700800. Its totient is φ = 6724981843200.

The previous prime is 11056120171519. The next prime is 11056120171573. The reversal of 11056120171521 is 12517102165011.

It is not a de Polignac number, because 11056120171521 - 2¹ = 11056120171519 is a prime.

It is a super-2 number, since 2×11056120171521² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11056120171501) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1147967376 + ... + 1147977006.

It is an arithmetic number, because the mean of its divisors is an integer number (251487667200).

Almost surely, 2^{11056120171521} is an apocalyptic number.

It is an amenable number.

11056120171521 is a deficient number, since it is larger than the sum of its proper divisors (5039090529279).

11056120171521 is a wasteful number, since it uses less digits than its factorization.

11056120171521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12750.

The product of its (nonzero) digits is 4200, while the sum is 33.

The spelling of 11056120171521 in words is "eleven trillion, fifty-six billion, one hundred twenty million, one hundred seventy-one thousand, five hundred twenty-one".