22111211121 has 8 divisors (see below), whose sum is σ = 29482455264. Its totient is φ = 14740387200.

The previous prime is 22111210999. The next prime is 22111211149. The reversal of 22111211121 is 12111211122.

It is a happy number.

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

It is not a de Polignac number, because 22111211121 - 2¹³ = 22111202929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22111211121.

It is not an unprimeable number, because it can be changed into a prime (22111212121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50721 + ... + 216321.

It is an arithmetic number, because the mean of its divisors is an integer number (3685306908).

Almost surely, 2^22111211121 is an apocalyptic number.

It is an amenable number.

22111211121 is a deficient number, since it is larger than the sum of its proper divisors (7371244143).

22111211121 is a wasteful number, since it uses less digits than its factorization.

22111211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210111.

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

Adding to 22111211121 its reverse (12111211122), we get a palindrome (34222422243).

Subtracting from 22111211121 its reverse (12111211122), we obtain a palindrome (9999999999).

The spelling of 22111211121 in words is "twenty-two billion, one hundred eleven million, two hundred eleven thousand, one hundred twenty-one".