222120211220 has 12 divisors (see below), whose sum is σ = 466452443604. Its totient is φ = 88848084480.

The previous prime is 222120211219. The next prime is 222120211223. The reversal of 222120211220 is 22112021222.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 175215913744 + 46904297476 = 418588^2 + 216574^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222120211223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5553005261 + ... + 5553005300.

It is an arithmetic number, because the mean of its divisors is an integer number (38871036967).

Almost surely, 2^222120211220 is an apocalyptic number.

222120211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222120211220 is an abundant number, since it is smaller than the sum of its proper divisors (244332232384).

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

222120211220 is a wasteful number, since it uses less digits than its factorization.

222120211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11106010570 (or 11106010568 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 222120211220 its reverse (22112021222), we get a palindrome (244232232442).

The spelling of 222120211220 in words is "two hundred twenty-two billion, one hundred twenty million, two hundred eleven thousand, two hundred twenty".