22211002221 has 16 divisors (see below), whose sum is σ = 29839588800. Its totient is φ = 14695050240.

The previous prime is 22211002211. The next prime is 22211002243. The reversal of 22211002221 is 12220011222.

It is not a de Polignac number, because 22211002221 - 2¹⁷ = 22210871149 is a prime.

It is a super-2 number, since 2×22211002221² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22211002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211002211) 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, 502221 + ... + 544653.

It is an arithmetic number, because the mean of its divisors is an integer number (1864974300).

Almost surely, 2^22211002221 is an apocalyptic number.

It is an amenable number.

22211002221 is a deficient number, since it is larger than the sum of its proper divisors (7628586579).

22211002221 is a wasteful number, since it uses less digits than its factorization.

22211002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43756.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22211002221 its reverse (12220011222), we get a palindrome (34431013443).

Subtracting from 22211002221 its reverse (12220011222), we obtain a palindrome (9990990999).

The spelling of 22211002221 in words is "twenty-two billion, two hundred eleven million, two thousand, two hundred twenty-one".