22222111111111 has 4 divisors (see below), whose sum is σ = 22223468700400. Its totient is φ = 22220753521824.

The previous prime is 22222111111097. The next prime is 22222111111199. The reversal of 22222111111111 is 11111111122222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22222111111111 - 2²⁷ = 22221976893383 is a prime.

It is a Duffinian number.

22222111111111 is a modest number, since divided by 11111111 gives 222221 as remainder.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222111115111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678770091 + ... + 678802828.

It is an arithmetic number, because the mean of its divisors is an integer number (5555867175100).

Almost surely, 2^{22222111111111} is an apocalyptic number.

22222111111111 is a deficient number, since it is larger than the sum of its proper divisors (1357589289).

22222111111111 is a wasteful number, since it uses less digits than its factorization.

22222111111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357589288.

The product of its digits is 32, while the sum is 19.

Adding to 22222111111111 its reverse (11111111122222), we get a palindrome (33333222233333).

It can be divided in two parts, 222221111 and 11111, that added together give a palindrome (222232222).

The spelling of 22222111111111 in words is "twenty-two trillion, two hundred twenty-two billion, one hundred eleven million, one hundred eleven thousand, one hundred eleven".