22212011111 has 4 divisors (see below), whose sum is σ = 22213501752. Its totient is φ = 22210520472.

The previous prime is 22212011089. The next prime is 22212011167. The reversal of 22212011111 is 11111021222.

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-22212011111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212011611) 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, 722741 + ... + 752846.

It is an arithmetic number, because the mean of its divisors is an integer number (5553375438).

Almost surely, 2^22212011111 is an apocalyptic number.

22212011111 is a deficient number, since it is larger than the sum of its proper divisors (1490641).

22212011111 is a wasteful number, since it uses less digits than its factorization.

22212011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490640.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 22212011111 its reverse (11111021222), we get a palindrome (33323032333).

The spelling of 22212011111 in words is "twenty-two billion, two hundred twelve million, eleven thousand, one hundred eleven".