22221110111212 has 24 divisors (see below), whose sum is σ = 39402680310000. Its totient is φ = 10963701805056.

The previous prime is 22221110111209. The next prime is 22221110111219. The reversal of 22221110111212 is 21211101112222.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 22221110111212.

It is not an unprimeable number, because it can be changed into a prime (22221110111219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62366293 + ... + 62721580.

It is an arithmetic number, because the mean of its divisors is an integer number (1641778346250).

Almost surely, 2^{22221110111212} is an apocalyptic number.

It is an amenable number.

22221110111212 is a deficient number, since it is larger than the sum of its proper divisors (17181570198788).

22221110111212 is a wasteful number, since it uses less digits than its factorization.

22221110111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125088465 (or 125088463 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 22221110111212 its reverse (21211101112222), we get a palindrome (43432211223434).

The spelling of 22221110111212 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred ten million, one hundred eleven thousand, two hundred twelve".