22212122201111 has 4 divisors (see below), whose sum is σ = 22212132129072. Its totient is φ = 22212112273152.

The previous prime is 22212122201083. The next prime is 22212122201147. The reversal of 22212122201111 is 11110222121222.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22212122201111 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 (22212122201411) 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, 144215 + ... + 6666711.

It is an arithmetic number, because the mean of its divisors is an integer number (5553033032268).

Almost surely, 2^{22212122201111} is an apocalyptic number.

22212122201111 is a deficient number, since it is larger than the sum of its proper divisors (9927961).

22212122201111 is an equidigital number, since it uses as much as digits as its factorization.

22212122201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9927960.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 22212122201111 its reverse (11110222121222), we get a palindrome (33322344322333).

The spelling of 22212122201111 in words is "twenty-two trillion, two hundred twelve billion, one hundred twenty-two million, two hundred one thousand, one hundred eleven".