22111002221 has 16 divisors (see below), whose sum is σ = 29017858560. Its totient is φ = 16322543280.

The previous prime is 22111002197. The next prime is 22111002227. The reversal of 22111002221 is 12220011122.

It is a cyclic number.

It is not a de Polignac number, because 22111002221 - 2⁶ = 22111002157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22111002196 and 22111002205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111002227) 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, 7555271 + ... + 7558196.

It is an arithmetic number, because the mean of its divisors is an integer number (1813616160).

Almost surely, 2^22111002221 is an apocalyptic number.

It is an amenable number.

22111002221 is a deficient number, since it is larger than the sum of its proper divisors (6906856339).

22111002221 is a wasteful number, since it uses less digits than its factorization.

22111002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15113504.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22111002221 its reverse (12220011122), we get a palindrome (34331013343).

The spelling of 22111002221 in words is "twenty-two billion, one hundred eleven million, two thousand, two hundred twenty-one".