22110211221 has 32 divisors (see below), whose sum is σ = 34126202880. Its totient is φ = 12471743424.

The previous prime is 22110211153. The next prime is 22110211223. The reversal of 22110211221 is 12211201122.

It is not a de Polignac number, because 22110211221 - 2⁷ = 22110211093 is a prime.

It is a super-2 number, since 2×22110211221² (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 22110211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22110211223) 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, 2388520 + ... + 2397758.

It is an arithmetic number, because the mean of its divisors is an integer number (1066443840).

Almost surely, 2^22110211221 is an apocalyptic number.

22110211221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22110211221 is a deficient number, since it is larger than the sum of its proper divisors (12015991659).

22110211221 is a wasteful number, since it uses less digits than its factorization.

22110211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10705.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22110211221 its reverse (12211201122), we get a palindrome (34321412343).

The spelling of 22110211221 in words is "twenty-two billion, one hundred ten million, two hundred eleven thousand, two hundred twenty-one".