222221212120 has 16 divisors (see below), whose sum is σ = 499997727360. Its totient is φ = 88888484832.

The previous prime is 222221212099. The next prime is 222221212133. The reversal of 222221212120 is 21212122222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2777765112 + ... + 2777765191.

It is an arithmetic number, because the mean of its divisors is an integer number (31249857960).

Almost surely, 2^222221212120 is an apocalyptic number.

222221212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222221212120 is an abundant number, since it is smaller than the sum of its proper divisors (277776515240).

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

222221212120 is a wasteful number, since it uses less digits than its factorization.

222221212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555530314 (or 5555530310 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 222221212120 its reverse (21212122222), we get a palindrome (243433334342).

The spelling of 222221212120 in words is "two hundred twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twenty".