22111222222211 has 4 divisors (see below), whose sum is σ = 22143595901112. Its totient is φ = 22078848543312.

The previous prime is 22111222222157. The next prime is 22111222222249. The reversal of 22111222222211 is 11222222211122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22111222222211 is a prime.

It is a super-2 number, since 2×22111222222211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22111222222261) 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, 16186838426 + ... + 16186839791.

It is an arithmetic number, because the mean of its divisors is an integer number (5535898975278).

Almost surely, 2^{22111222222211} is an apocalyptic number.

22111222222211 is a deficient number, since it is larger than the sum of its proper divisors (32373678901).

22111222222211 is an equidigital number, since it uses as much as digits as its factorization.

22111222222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32373678900.

The product of its digits is 512, while the sum is 23.

Adding to 22111222222211 its reverse (11222222211122), we get a palindrome (33333444433333).

The spelling of 22111222222211 in words is "twenty-two trillion, one hundred eleven billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred eleven".