22111212210111 has 12 divisors (see below), whose sum is σ = 32801618113992. Its totient is φ = 14342407919856.

The previous prime is 22111212210089. The next prime is 22111212210149. The reversal of 22111212210111 is 11101221211122.

It is a happy number.

22111212210111 is a `hidden beast` number, since 2 + 211 + 121 + 221 + 0 + 111 = 666.

It is not a de Polignac number, because 22111212210111 - 2¹⁷ = 22111212079039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111212210011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33200018001 + ... + 33200018666.

It is an arithmetic number, because the mean of its divisors is an integer number (2733468176166).

Almost surely, 2^{22111212210111} is an apocalyptic number.

22111212210111 is a deficient number, since it is larger than the sum of its proper divisors (10690405903881).

22111212210111 is a wasteful number, since it uses less digits than its factorization.

22111212210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66400036710 (or 66400036707 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 22111212210111 its reverse (11101221211122), we get a palindrome (33212433421233).

The spelling of 22111212210111 in words is "twenty-two trillion, one hundred eleven billion, two hundred twelve million, two hundred ten thousand, one hundred eleven".