221222212220112 has 20 divisors (see below), whose sum is σ = 571490714902080. Its totient is φ = 73740737406688.

The previous prime is 221222212220111. The next prime is 221222212220117. The reversal of 221222212220112 is 211022212222122.

It is a happy number.

It is a super-3 number, since 3×221222212220112³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222212220111) 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, 2304398043912 + ... + 2304398044007.

It is an arithmetic number, because the mean of its divisors is an integer number (28574535745104).

Almost surely, 2^{221222212220112} is an apocalyptic number.

It is an amenable number.

221222212220112 is an abundant number, since it is smaller than the sum of its proper divisors (350268502681968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221222212220112 is a wasteful number, since it uses less digits than its factorization.

221222212220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4608796087930 (or 4608796087924 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 221222212220112 its reverse (211022212222122), we get a palindrome (432244424442234).

The spelling of 221222212220112 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, two hundred twelve million, two hundred twenty thousand, one hundred twelve".