22111101121221 has 48 divisors (see below), whose sum is σ = 38295990074368. Its totient is φ = 12026888812800.

The previous prime is 22111101121199. The next prime is 22111101121223. The reversal of 22111101121221 is 12212110111122.

It is a happy number.

22111101121221 is a `hidden beast` number, since 2 + 211 + 110 + 1 + 121 + 221 = 666.

It is not a de Polignac number, because 22111101121221 - 2⁵ = 22111101121189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22111101121194 and 22111101121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111101121223) 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, 92680936 + ... + 92919201.

Almost surely, 2^{22111101121221} is an apocalyptic number.

22111101121221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22111101121221 is a deficient number, since it is larger than the sum of its proper divisors (16184888953147).

22111101121221 is a wasteful number, since it uses less digits than its factorization.

22111101121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185600242 (or 185600239 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 22111101121221 its reverse (12212110111122), we get a palindrome (34323211232343).

The spelling of 22111101121221 in words is "twenty-two trillion, one hundred eleven billion, one hundred one million, one hundred twenty-one thousand, two hundred twenty-one".