21222001110111 has 16 divisors (see below), whose sum is σ = 29168119263744. Its totient is φ = 13717568415104.

The previous prime is 21222001110067. The next prime is 21222001110133. The reversal of 21222001110111 is 11101110022212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21222001110111 - 2¹⁰ = 21222001109087 is a prime.

It is a super-2 number, since 2×21222001110111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222001110161) 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, 703305690 + ... + 703335863.

It is an arithmetic number, because the mean of its divisors is an integer number (1823007453984).

Almost surely, 2^{21222001110111} is an apocalyptic number.

21222001110111 is a deficient number, since it is larger than the sum of its proper divisors (7946118153633).

21222001110111 is a wasteful number, since it uses less digits than its factorization.

21222001110111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406641710.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21222001110111 its reverse (11101110022212), we get a palindrome (32323111132323).

The spelling of 21222001110111 in words is "twenty-one trillion, two hundred twenty-two billion, one million, one hundred ten thousand, one hundred eleven".