222112222220 has 96 divisors (see below), whose sum is σ = 558635470848. Its totient is φ = 72528901632.

The previous prime is 222112222187. The next prime is 222112222223. The reversal of 222112222220 is 22222211222.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 222112222192 and 222112222201.

It is not an unprimeable number, because it can be changed into a prime (222112222223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 602237 + ... + 898283.

It is an arithmetic number, because the mean of its divisors is an integer number (5819119488).

Almost surely, 2^222112222220 is an apocalyptic number.

222112222220 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 222112222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279317735424).

222112222220 is an abundant number, since it is smaller than the sum of its proper divisors (336523248628).

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

222112222220 is a wasteful number, since it uses less digits than its factorization.

222112222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296319 (or 296317 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 222112222220 its reverse (22222211222), we get a palindrome (244334433442).

The spelling of 222112222220 in words is "two hundred twenty-two billion, one hundred twelve million, two hundred twenty-two thousand, two hundred twenty".