11312221333221 has 48 divisors (see below), whose sum is σ = 16634905417728. Its totient is φ = 7406617881600.

The previous prime is 11312221333199. The next prime is 11312221333241. The reversal of 11312221333221 is 12233312221311.

11312221333221 is a `hidden beast` number, since 1 + 1 + 3 + 122 + 213 + 3 + 322 + 1 = 666.

It is not a de Polignac number, because 11312221333221 - 2⁷ = 11312221333093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312221333241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 166417681 + ... + 166485641.

It is an arithmetic number, because the mean of its divisors is an integer number (346560529536).

Almost surely, 2^{11312221333221} is an apocalyptic number.

It is an amenable number.

11312221333221 is a deficient number, since it is larger than the sum of its proper divisors (5322684084507).

11312221333221 is a wasteful number, since it uses less digits than its factorization.

11312221333221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69562 (or 69559 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

Adding to 11312221333221 its reverse (12233312221311), we get a palindrome (23545533554532).

The spelling of 11312221333221 in words is "eleven trillion, three hundred twelve billion, two hundred twenty-one million, three hundred thirty-three thousand, two hundred twenty-one".