221000222212 has 96 divisors (see below), whose sum is σ = 487344824064. Its totient is φ = 85183488000.

The previous prime is 221000222203. The next prime is 221000222221. The reversal of 221000222212 is 212222000122.

221000222212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221000222203) and next prime (221000222221).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58263388 + ... + 58267180.

It is an arithmetic number, because the mean of its divisors is an integer number (5076508584).

Almost surely, 2^221000222212 is an apocalyptic number.

221000222212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221000222212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243672412032).

221000222212 is an abundant number, since it is smaller than the sum of its proper divisors (266344601852).

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

221000222212 is a wasteful number, since it uses less digits than its factorization.

221000222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5789 (or 5787 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 221000222212 its reverse (212222000122), we get a palindrome (433222222334).

The spelling of 221000222212 in words is "two hundred twenty-one billion, two hundred twenty-two thousand, two hundred twelve".