22212202221 has 12 divisors (see below), whose sum is σ = 35001046080. Its totient is φ = 13461940680.

The previous prime is 22212202219. The next prime is 22212202241. The reversal of 22212202221 is 12220221222.

22212202221 is a `hidden beast` number, since 2 + 221 + 220 + 2 + 221 = 666.

It is not a de Polignac number, because 22212202221 - 2¹ = 22212202219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22212202194 and 22212202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212202241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112182741 + ... + 112182938.

It is an arithmetic number, because the mean of its divisors is an integer number (2916753840).

Almost surely, 2^22212202221 is an apocalyptic number.

It is an amenable number.

22212202221 is a deficient number, since it is larger than the sum of its proper divisors (12788843859).

22212202221 is a wasteful number, since it uses less digits than its factorization.

22212202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224365696 (or 224365693 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22212202221 its reverse (12220221222), we get a palindrome (34432423443).

The spelling of 22212202221 in words is "twenty-two billion, two hundred twelve million, two hundred two thousand, two hundred twenty-one".