22112220212111 has 4 divisors (see below), whose sum is σ = 22112238914424. Its totient is φ = 22112201509800.

The previous prime is 22112220212083. The next prime is 22112220212123. The reversal of 22112220212111 is 11121202221122.

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-22112220212111 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 (22112220212161) 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, 7448645 + ... + 9985326.

It is an arithmetic number, because the mean of its divisors is an integer number (5528059728606).

Almost surely, 2^{22112220212111} is an apocalyptic number.

22112220212111 is a deficient number, since it is larger than the sum of its proper divisors (18702313).

22112220212111 is a wasteful number, since it uses less digits than its factorization.

22112220212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18702312.

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

Adding to 22112220212111 its reverse (11121202221122), we get a palindrome (33233422433233).

The spelling of 22112220212111 in words is "twenty-two trillion, one hundred twelve billion, two hundred twenty million, two hundred twelve thousand, one hundred eleven".