22221202221 has 96 divisors (see below), whose sum is σ = 36398868480. Its totient is φ = 12992918400.

The previous prime is 22221202219. The next prime is 22221202229. The reversal of 22221202221 is 12220212222.

22221202221 is a `hidden beast` number, since 22 + 221 + 202 + 221 = 666.

It is not a de Polignac number, because 22221202221 - 2¹ = 22221202219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22221202194 and 22221202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221202229) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 45256786 + ... + 45257276.

It is an arithmetic number, because the mean of its divisors is an integer number (379154880).

Almost surely, 2^22221202221 is an apocalyptic number.

It is an amenable number.

22221202221 is a deficient number, since it is larger than the sum of its proper divisors (14177666259).

22221202221 is a wasteful number, since it uses less digits than its factorization.

22221202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887 (or 884 counting only the distinct ones).

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

Adding to 22221202221 its reverse (12220212222), we get a palindrome (34441414443).

The spelling of 22221202221 in words is "twenty-two billion, two hundred twenty-one million, two hundred two thousand, two hundred twenty-one".