22112102021111 has 4 divisors (see below), whose sum is σ = 22190236657512. Its totient is φ = 22033967384712.

The previous prime is 22112102021029. The next prime is 22112102021117. The reversal of 22112102021111 is 11112020121122.

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-22112102021111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22112102021111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112102021117) 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, 39067317776 + ... + 39067318341.

It is an arithmetic number, because the mean of its divisors is an integer number (5547559164378).

Almost surely, 2^{22112102021111} is an apocalyptic number.

22112102021111 is a deficient number, since it is larger than the sum of its proper divisors (78134636401).

22112102021111 is an equidigital number, since it uses as much as digits as its factorization.

22112102021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78134636400.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 22112102021111 its reverse (11112020121122), we get a palindrome (33224122142233).

The spelling of 22112102021111 in words is "twenty-two trillion, one hundred twelve billion, one hundred two million, twenty-one thousand, one hundred eleven".