221111112212 has 24 divisors (see below), whose sum is σ = 389333870016. Its totient is φ = 109873110528.

The previous prime is 221111112169. The next prime is 221111112263. The reversal of 221111112212 is 212211111122.

221111112212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3948803 + ... + 4004405.

It is an arithmetic number, because the mean of its divisors is an integer number (16222244584).

Almost surely, 2^221111112212 is an apocalyptic number.

It is an amenable number.

221111112212 is a deficient number, since it is larger than the sum of its proper divisors (168222757804).

221111112212 is a wasteful number, since it uses less digits than its factorization.

221111112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61727 (or 61725 counting only the distinct ones).

The product of its digits is 32, while the sum is 17.

Adding to 221111112212 its reverse (212211111122), we get a palindrome (433322223334).

The spelling of 221111112212 in words is "two hundred twenty-one billion, one hundred eleven million, one hundred twelve thousand, two hundred twelve".