222222121122210 has 128 divisors (see below), whose sum is σ = 591698695219200. Its totient is φ = 52957202565120.

The previous prime is 222222121122191. The next prime is 222222121122251. The reversal of 222222121122210 is 12221121222222.

It is a happy number.

It is a super-2 number, since 2×222222121122210² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 649679211 + ... + 650021169.

It is an arithmetic number, because the mean of its divisors is an integer number (4622646056400).

Almost surely, 2^{222222121122210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222222121122210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295849347609600).

222222121122210 is an abundant number, since it is smaller than the sum of its proper divisors (369476574096990).

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

222222121122210 is a wasteful number, since it uses less digits than its factorization.

222222121122210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375416.

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 222222121122210 its reverse (12221121222222), we get a palindrome (234443242344432).

The spelling of 222222121122210 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred ten".