22111112221121 has 16 divisors (see below), whose sum is σ = 27602949010560. Its totient is φ = 17207033057280.

The previous prime is 22111112221087. The next prime is 22111112221171. The reversal of 22111112221121 is 12112221111122.

It is a happy number.

It is not a de Polignac number, because 22111112221121 - 2⁶ = 22111112221057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22111112221093 and 22111112221102.

It is not an unprimeable number, because it can be changed into a prime (22111112221171) 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, 186649046 + ... + 186767471.

It is an arithmetic number, because the mean of its divisors is an integer number (1725184313160).

Almost surely, 2^{22111112221121} is an apocalyptic number.

It is an amenable number.

22111112221121 is a deficient number, since it is larger than the sum of its proper divisors (5491836789439).

22111112221121 is a wasteful number, since it uses less digits than its factorization.

22111112221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373417304.

The product of its digits is 64, while the sum is 20.

Adding to 22111112221121 its reverse (12112221111122), we get a palindrome (34223333332243).

The spelling of 22111112221121 in words is "twenty-two trillion, one hundred eleven billion, one hundred twelve million, two hundred twenty-one thousand, one hundred twenty-one".