22211111211 has 16 divisors (see below), whose sum is σ = 30427167264. Its totient is φ = 14401545984.

The previous prime is 22211111173. The next prime is 22211111227. The reversal of 22211111211 is 11211111222.

It is a happy number.

It is not a de Polignac number, because 22211111211 - 2⁶ = 22211111147 is a prime.

It is a super-2 number, since 2×22211111211² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22211111231) 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, 254265 + ... + 330261.

It is an arithmetic number, because the mean of its divisors is an integer number (1901697954).

Almost surely, 2^22211111211 is an apocalyptic number.

22211111211 is a deficient number, since it is larger than the sum of its proper divisors (8216056053).

22211111211 is a wasteful number, since it uses less digits than its factorization.

22211111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78670.

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

Adding to 22211111211 its reverse (11211111222), we get a palindrome (33422222433).

The spelling of 22211111211 in words is "twenty-two billion, two hundred eleven million, one hundred eleven thousand, two hundred eleven".