222100212120 has 256 divisors, whose sum is σ = 721693203840. Its totient is φ = 54471426048.

The previous prime is 222100212109. The next prime is 222100212121. The reversal of 222100212120 is 21212001222.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 222100212120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222100212121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27782844 + ... + 27790836.

Almost surely, 2^222100212120 is an apocalyptic number.

222100212120 is a gapful number since it is divisible by the number (20) 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 222100212120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360846601920).

222100212120 is an abundant number, since it is smaller than the sum of its proper divisors (499592991720).

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

222100212120 is a wasteful number, since it uses less digits than its factorization.

222100212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8334 (or 8330 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 222100212120 its reverse (21212001222), we get a palindrome (243312213342).

The spelling of 222100212120 in words is "two hundred twenty-two billion, one hundred million, two hundred twelve thousand, one hundred twenty".