22111101111 has 16 divisors (see below), whose sum is σ = 32768426880. Its totient is φ = 13147823520.

The previous prime is 22111101071. The next prime is 22111101113. The reversal of 22111101111 is 11110111122.

It is not a de Polignac number, because 22111101111 - 2¹⁷ = 22110970039 is a prime.

It is a super-4 number, since 4×22111101111⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111101113) 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, 6319321 + ... + 6322818.

It is an arithmetic number, because the mean of its divisors is an integer number (2048026680).

Almost surely, 2^22111101111 is an apocalyptic number.

22111101111 is a deficient number, since it is larger than the sum of its proper divisors (10657325769).

22111101111 is a wasteful number, since it uses less digits than its factorization.

22111101111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12642206.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 22111101111 its reverse (11110111122), we get a palindrome (33221212233).

It can be divided in two parts, 22 and 111101111, that multiplied together give a palindrome (2444224442).

The spelling of 22111101111 in words is "twenty-two billion, one hundred eleven million, one hundred one thousand, one hundred eleven".