222112221210 has 96 divisors (see below), whose sum is σ = 631427322240. Its totient is φ = 53722627200.

The previous prime is 222112221197. The next prime is 222112221223. The reversal of 222112221210 is 12122211222.

It is a happy number.

222112221210 is a `hidden beast` number, since 2 + 221 + 12 + 221 + 210 = 666.

It is an interprime number because it is at equal distance from previous prime (222112221197) and next prime (222112221223).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 179080 + ... + 690140.

It is an arithmetic number, because the mean of its divisors is an integer number (6577367940).

Almost surely, 2^222112221210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222112221210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315713661120).

222112221210 is an abundant number, since it is smaller than the sum of its proper divisors (409315101030).

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

222112221210 is a wasteful number, since it uses less digits than its factorization.

222112221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511524 (or 511521 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222112221210 its reverse (12122211222), we get a palindrome (234234432432).

The spelling of 222112221210 in words is "two hundred twenty-two billion, one hundred twelve million, two hundred twenty-one thousand, two hundred ten".