22220002221 has 16 divisors (see below), whose sum is σ = 29752714560. Its totient is φ = 14750386560.

The previous prime is 22220002199. The next prime is 22220002241. The reversal of 22220002221 is 12220002222.

It is not a de Polignac number, because 22220002221 - 2⁷ = 22220002093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22220002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220002241) 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, 1322751 + ... + 1339443.

It is an arithmetic number, because the mean of its divisors is an integer number (1859544660).

Almost surely, 2^22220002221 is an apocalyptic number.

It is an amenable number.

22220002221 is a deficient number, since it is larger than the sum of its proper divisors (7532712339).

22220002221 is a wasteful number, since it uses less digits than its factorization.

22220002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18556.

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 22220002221 its reverse (12220002222), we get a palindrome (34440004443).

Subtracting from 22220002221 its reverse (12220002222), we obtain a palindrome (9999999999).

The spelling of 22220002221 in words is "twenty-two billion, two hundred twenty million, two thousand, two hundred twenty-one".