22111211211121 has 4 divisors (see below), whose sum is σ = 22112684030452. Its totient is φ = 22109738391792.

The previous prime is 22111211211083. The next prime is 22111211211137. The reversal of 22111211211121 is 12111211211122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19921805658225 + 2189405552896 = 4463385^2 + 1479664^2 .

It is a cyclic number.

It is not a de Polignac number, because 22111211211121 - 2⁴³ = 13315118188913 is a prime.

It is a super-2 number, since 2×22111211211121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22111211211181) 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, 736387146 + ... + 736417171.

It is an arithmetic number, because the mean of its divisors is an integer number (5528171007613).

Almost surely, 2^{22111211211121} is an apocalyptic number.

It is an amenable number.

22111211211121 is a deficient number, since it is larger than the sum of its proper divisors (1472819331).

22111211211121 is a wasteful number, since it uses less digits than its factorization.

22111211211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472819330.

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

Adding to 22111211211121 its reverse (12111211211122), we get a palindrome (34222422422243).

Subtracting from 22111211211121 its reverse (12111211211122), we obtain a palindrome (9999999999999).

The spelling of 22111211211121 in words is "twenty-two trillion, one hundred eleven billion, two hundred eleven million, two hundred eleven thousand, one hundred twenty-one".