221112222212 has 24 divisors (see below), whose sum is σ = 446517891456. Its totient is φ = 93842356608.

The previous prime is 221112222211. The next prime is 221112222241. The reversal of 221112222212 is 212222211122.

It is a super-2 number, since 2×221112222212² (a number of 23 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (221112222211) 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, 38331413 + ... + 38337180.

It is an arithmetic number, because the mean of its divisors is an integer number (18604912144).

Almost surely, 2^221112222212 is an apocalyptic number.

It is an amenable number.

221112222212 is an abundant number, since it is smaller than the sum of its proper divisors (225405669244).

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

221112222212 is a wasteful number, since it uses less digits than its factorization.

221112222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76668707 (or 76668705 counting only the distinct ones).

The product of its digits is 256, while the sum is 20.

Adding to 221112222212 its reverse (212222211122), we get a palindrome (433334433334).

The spelling of 221112222212 in words is "two hundred twenty-one billion, one hundred twelve million, two hundred twenty-two thousand, two hundred twelve".