11556521024420 has 96 divisors (see below), whose sum is σ = 25206370560000. Its totient is φ = 4445294515200.

The previous prime is 11556521024401. The next prime is 11556521024437. The reversal of 11556521024420 is 2442012565511.

It is a super-2 number, since 2×11556521024420² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 570710456 + ... + 570730704.

It is an arithmetic number, because the mean of its divisors is an integer number (262566360000).

Almost surely, 2^{11556521024420} is an apocalyptic number.

11556521024420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11556521024420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12603185280000).

11556521024420 is an abundant number, since it is smaller than the sum of its proper divisors (13649849535580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11556521024420 is a wasteful number, since it uses less digits than its factorization.

11556521024420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24189 (or 24187 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 38.

Adding to 11556521024420 its reverse (2442012565511), we get a palindrome (13998533589931).

The spelling of 11556521024420 in words is "eleven trillion, five hundred fifty-six billion, five hundred twenty-one million, twenty-four thousand, four hundred twenty".