222102002220221 has 8 divisors (see below), whose sum is σ = 235228826166264. Its totient is φ = 208982067194880.

The previous prime is 222102002220193. The next prime is 222102002220269. The reversal of 222102002220221 is 122022200201222.

It can be written as a sum of positive squares in 4 ways, for example, as 13832366817721 + 208269635402500 = 3719189^2 + 14431550^2 .

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 222102002220221 - 2¹⁸ = 222102001958077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222102002220193 and 222102002220202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222102002250221) 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, 1722163790 + ... + 1722292751.

It is an arithmetic number, because the mean of its divisors is an integer number (29403603270783).

Almost surely, 2^{222102002220221} is an apocalyptic number.

It is an amenable number.

222102002220221 is a deficient number, since it is larger than the sum of its proper divisors (13126823946043).

222102002220221 is a wasteful number, since it uses less digits than its factorization.

222102002220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3444460351.

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

Adding to 222102002220221 its reverse (122022200201222), we get a palindrome (344124202421443).

The spelling of 222102002220221 in words is "two hundred twenty-two trillion, one hundred two billion, two million, two hundred twenty thousand, two hundred twenty-one".