222120120222221 has 4 divisors (see below), whose sum is σ = 239206283316252. Its totient is φ = 205033957128192.

The previous prime is 222120120222191. The next prime is 222120120222283. The reversal of 222120120222221 is 122222021021222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29715090834025 + 192405029388196 = 5451155^2 + 13871014^2 .

It is a cyclic number.

It is not a de Polignac number, because 222120120222221 - 2³⁴ = 222102940353037 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 (222120120224221) 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, 8543081546996 + ... + 8543081547021.

It is an arithmetic number, because the mean of its divisors is an integer number (59801570829063).

Almost surely, 2^{222120120222221} is an apocalyptic number.

It is an amenable number.

222120120222221 is a deficient number, since it is larger than the sum of its proper divisors (17086163094031).

222120120222221 is a wasteful number, since it uses less digits than its factorization.

222120120222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17086163094030.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 222120120222221 its reverse (122222021021222), we get a palindrome (344342141243443).

The spelling of 222120120222221 in words is "two hundred twenty-two trillion, one hundred twenty billion, one hundred twenty million, two hundred twenty-two thousand, two hundred twenty-one".