21222022111 has 8 divisors (see below), whose sum is σ = 21265548080. Its totient is φ = 21178542528.

The previous prime is 21222022093. The next prime is 21222022123. The reversal of 21222022111 is 11122022212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21222022111 - 2⁹ = 21222021599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222002111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 991060 + ... + 1012246.

It is an arithmetic number, because the mean of its divisors is an integer number (2658193510).

Almost surely, 2^21222022111 is an apocalyptic number.

21222022111 is a deficient number, since it is larger than the sum of its proper divisors (43525969).

21222022111 is a wasteful number, since it uses less digits than its factorization.

21222022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23193.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21222022111 its reverse (11122022212), we get a palindrome (32344044323).

The spelling of 21222022111 in words is "twenty-one billion, two hundred twenty-two million, twenty-two thousand, one hundred eleven".