11521114510221 has 32 divisors (see below), whose sum is σ = 17113194088320. Its totient is φ = 7660574756352.

The previous prime is 11521114510189. The next prime is 11521114510223. The reversal of 11521114510221 is 12201541112511.

11521114510221 is a `hidden beast` number, since 1 + 1 + 521 + 1 + 14 + 5 + 102 + 21 = 666.

It is not a de Polignac number, because 11521114510221 - 2⁵ = 11521114510189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11521114510223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15574486 + ... + 16297448.

It is an arithmetic number, because the mean of its divisors is an integer number (534787315260).

Almost surely, 2^{11521114510221} is an apocalyptic number.

It is an amenable number.

11521114510221 is a deficient number, since it is larger than the sum of its proper divisors (5592079578099).

11521114510221 is an equidigital number, since it uses as much as digits as its factorization.

11521114510221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724522 (or 724516 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 27.

Adding to 11521114510221 its reverse (12201541112511), we get a palindrome (23722655622732).

The spelling of 11521114510221 in words is "eleven trillion, five hundred twenty-one billion, one hundred fourteen million, five hundred ten thousand, two hundred twenty-one".