221011112212 has 48 divisors (see below), whose sum is σ = 432445192704. Its totient is φ = 97958592000.

The previous prime is 221011112167. The next prime is 221011112233. The reversal of 221011112212 is 212211110122.

221011112212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3564637 + ... + 3626107.

It is an arithmetic number, because the mean of its divisors is an integer number (9009274848).

Almost surely, 2^221011112212 is an apocalyptic number.

221011112212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221011112212 is a deficient number, since it is larger than the sum of its proper divisors (211434080492).

221011112212 is a wasteful number, since it uses less digits than its factorization.

221011112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63520 (or 63518 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221011112212 its reverse (212211110122), we get a palindrome (433222222334).

The spelling of 221011112212 in words is "two hundred twenty-one billion, eleven million, one hundred twelve thousand, two hundred twelve".