22111222211121 has 4 divisors (see below), whose sum is σ = 29481629614832. Its totient is φ = 14740814807412.

The previous prime is 22111222211107. The next prime is 22111222211153. The reversal of 22111222211121 is 12111222211122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-22111222211121 is a prime.

It is a super-2 number, since 2×22111222211121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22111222231121) 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 3 ways as a sum of consecutive naturals, for example, 3685203701851 + ... + 3685203701856.

It is an arithmetic number, because the mean of its divisors is an integer number (7370407403708).

Almost surely, 2^{22111222211121} is an apocalyptic number.

It is an amenable number.

22111222211121 is a deficient number, since it is larger than the sum of its proper divisors (7370407403711).

22111222211121 is an equidigital number, since it uses as much as digits as its factorization.

22111222211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7370407403710.

The product of its digits is 128, while the sum is 21.

Adding to 22111222211121 its reverse (12111222211122), we get a palindrome (34222444422243).

Subtracting from 22111222211121 its reverse (12111222211122), we obtain a palindrome (9999999999999).

The spelling of 22111222211121 in words is "twenty-two trillion, one hundred eleven billion, two hundred twenty-two million, two hundred eleven thousand, one hundred twenty-one".