222222121111220 has 48 divisors (see below), whose sum is σ = 478906819908048. Its totient is φ = 86565134883840.

The previous prime is 222222121111217. The next prime is 222222121111247. The reversal of 222222121111220 is 22111121222222.

It can be written as a sum of positive squares in 8 ways, for example, as 106172951808676 + 116049169302544 = 10304026^2 + 10772612^2 .

It is a super-3 number, since 3×222222121111220³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 242813087 + ... + 243726566.

It is an arithmetic number, because the mean of its divisors is an integer number (9977225414751).

Almost surely, 2^{222222121111220} is an apocalyptic number.

222222121111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222222121111220 is an abundant number, since it is smaller than the sum of its proper divisors (256684698796828).

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

222222121111220 is a wasteful number, since it uses less digits than its factorization.

222222121111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486540260 (or 486540258 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 222222121111220 its reverse (22111121222222), we get a palindrome (244333242333442).

The spelling of 222222121111220 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty".