22111210111 has 4 divisors (see below), whose sum is σ = 22111514992. Its totient is φ = 22110905232.

The previous prime is 22111210091. The next prime is 22111210153. The reversal of 22111210111 is 11101211122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 11101211122 = 2 ⋅5550605561.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22111210111 is a prime.

It is a super-2 number, since 2×22111210111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22111210091 and 22111210100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111210171) 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, 25870 + ... + 211876.

It is an arithmetic number, because the mean of its divisors is an integer number (5527878748).

Almost surely, 2^22111210111 is an apocalyptic number.

22111210111 is a deficient number, since it is larger than the sum of its proper divisors (304881).

22111210111 is a wasteful number, since it uses less digits than its factorization.

22111210111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304880.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 22111210111 its reverse (11101211122), we get a palindrome (33212421233).

The spelling of 22111210111 in words is "twenty-two billion, one hundred eleven million, two hundred ten thousand, one hundred eleven".