222212021222221 has 8 divisors (see below), whose sum is σ = 236862399252600. Its totient is φ = 207737096821248.

The previous prime is 222212021222203. The next prime is 222212021222251. The reversal of 222212021222221 is 122222120212222.

It can be written as a sum of positive squares in 4 ways, for example, as 1507898041225 + 220704123180996 = 1227965^2 + 14856114^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222212021222221 - 2⁵ = 222212021222189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222212021222251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43863404736 + ... + 43863409801.

It is an arithmetic number, because the mean of its divisors is an integer number (29607799906575).

Almost surely, 2^{222212021222221} is an apocalyptic number.

It is an amenable number.

222212021222221 is a deficient number, since it is larger than the sum of its proper divisors (14650378030379).

222212021222221 is a wasteful number, since it uses less digits than its factorization.

222212021222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87726814703.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 222212021222221 its reverse (122222120212222), we get a palindrome (344434141434443).

The spelling of 222212021222221 in words is "two hundred twenty-two trillion, two hundred twelve billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty-one".