222222120001220 has 24 divisors (see below), whose sum is σ = 482758398624600. Its totient is φ = 85823715310592.

The previous prime is 222222120001187. The next prime is 222222120001279. The reversal of 222222120001220 is 22100021222222.

It can be written as a sum of positive squares in 4 ways, for example, as 30962458329664 + 191259661671556 = 5564392^2 + 13829666^2 .

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 = 222222120001192 and 222222120001201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191570792525 + ... + 191570793684.

It is an arithmetic number, because the mean of its divisors is an integer number (20114933276025).

Almost surely, 2^{222222120001220} is an apocalyptic number.

222222120001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222222120001220 is an abundant number, since it is smaller than the sum of its proper divisors (260536278623380).

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

222222120001220 is a wasteful number, since it uses less digits than its factorization.

222222120001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383141586247 (or 383141586245 counting only the distinct ones).

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

Adding to 222222120001220 its reverse (22100021222222), we get a palindrome (244322141223442).

The spelling of 222222120001220 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, one hundred twenty million, one thousand, two hundred twenty".