22111202011221 has 16 divisors (see below), whose sum is σ = 32762492766720. Its totient is φ = 14738480936640.

The previous prime is 22111202011211. The next prime is 22111202011259. The reversal of 22111202011221 is 12211020211122.

22111202011221 is a `hidden beast` number, since 221 + 1 + 1 + 20 + 201 + 1 + 221 = 666.

It is not a de Polignac number, because 22111202011221 - 2²⁶ = 22111134902357 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22111202011194 and 22111202011203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111202011211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64280965 + ... + 64624026.

It is an arithmetic number, because the mean of its divisors is an integer number (2047655797920).

Almost surely, 2^{22111202011221} is an apocalyptic number.

It is an amenable number.

22111202011221 is a deficient number, since it is larger than the sum of its proper divisors (10651290755499).

22111202011221 is a wasteful number, since it uses less digits than its factorization.

22111202011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128911353 (or 128911347 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 22111202011221 its reverse (12211020211122), we get a palindrome (34322222222343).

The spelling of 22111202011221 in words is "twenty-two trillion, one hundred eleven billion, two hundred two million, eleven thousand, two hundred twenty-one".