22110022221 has 32 divisors (see below), whose sum is σ = 34239221760. Its totient is φ = 12430027584.

The previous prime is 22110022189. The next prime is 22110022229. The reversal of 22110022221 is 12222001122.

It is not a de Polignac number, because 22110022221 - 2⁵ = 22110022189 is a prime.

It is a super-2 number, since 2×22110022221² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22110022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22110022229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 445951 + ... + 493043.

It is an arithmetic number, because the mean of its divisors is an integer number (1069975680).

Almost surely, 2^22110022221 is an apocalyptic number.

22110022221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22110022221 is a deficient number, since it is larger than the sum of its proper divisors (12129199539).

22110022221 is a wasteful number, since it uses less digits than its factorization.

22110022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47465.

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

Adding to 22110022221 its reverse (12222001122), we get a palindrome (34332023343).

The spelling of 22110022221 in words is "twenty-two billion, one hundred ten million, twenty-two thousand, two hundred twenty-one".