22220000002221 has 32 divisors (see below), whose sum is σ = 33880436206848. Its totient is φ = 12689124464640.

The previous prime is 22220000002217. The next prime is 22220000002303. The reversal of 22220000002221 is 12220000002222.

It is not a de Polignac number, because 22220000002221 - 2² = 22220000002217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22220000002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220000002721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 248054281 + ... + 248143841.

It is an arithmetic number, because the mean of its divisors is an integer number (1058763631464).

Almost surely, 2^{22220000002221} is an apocalyptic number.

22220000002221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22220000002221 is a deficient number, since it is larger than the sum of its proper divisors (11660436204627).

22220000002221 is a wasteful number, since it uses less digits than its factorization.

22220000002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96901.

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

Adding to 22220000002221 its reverse (12220000002222), we get a palindrome (34440000004443).

Subtracting from 22220000002221 its reverse (12220000002222), we obtain a palindrome (9999999999999).

The spelling of 22220000002221 in words is "twenty-two trillion, two hundred twenty billion, two thousand, two hundred twenty-one".