222222120211021 has 12 divisors (see below), whose sum is σ = 258839437852380. Its totient is φ = 190228409763840.

The previous prime is 222222120211019. The next prime is 222222120211129. The reversal of 222222120211021 is 120112021222222.

It can be written as a sum of positive squares in 2 ways, for example, as 126335037292996 + 95887082918025 = 11239886^2 + 9792195^2 .

It is not a de Polignac number, because 222222120211021 - 2¹ = 222222120211019 is a prime.

It is a super-2 number, since 2×222222120211021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 222222120210983 and 222222120211001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222222120217021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2948691390 + ... + 2948766751.

It is an arithmetic number, because the mean of its divisors is an integer number (21569953154365).

Almost surely, 2^{222222120211021} is an apocalyptic number.

It is an amenable number.

222222120211021 is a deficient number, since it is larger than the sum of its proper divisors (36617317641359).

222222120211021 is an equidigital number, since it uses as much as digits as its factorization.

222222120211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5897458924 (or 5897458917 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 222222120211021 its reverse (120112021222222), we get a palindrome (342334141433243).

The spelling of 222222120211021 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, one hundred twenty million, two hundred eleven thousand, twenty-one".