222213020312221 has 16 divisors (see below), whose sum is σ = 243653599086768. Its totient is φ = 201831734707200.

The previous prime is 222213020312161. The next prime is 222213020312249. The reversal of 222213020312221 is 122213020312222.

It can be written as a sum of positive squares in 8 ways, for example, as 3781025804196 + 218431994508025 = 1944486^2 + 14779445^2 .

It is a cyclic number.

It is not a de Polignac number, because 222213020312221 - 2¹¹ = 222213020310173 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 (222213020312321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2021496870 + ... + 2021606791.

It is an arithmetic number, because the mean of its divisors is an integer number (15228349942923).

Almost surely, 2^{222213020312221} is an apocalyptic number.

It is an amenable number.

222213020312221 is a deficient number, since it is larger than the sum of its proper divisors (21440578774547).

222213020312221 is a wasteful number, since it uses less digits than its factorization.

222213020312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4043103792.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 222213020312221 its reverse (122213020312222), we get a palindrome (344426040624443).

Subtracting from 222213020312221 its reverse (122213020312222), we obtain a palindrome (99999999999999).

The spelling of 222213020312221 in words is "two hundred twenty-two trillion, two hundred thirteen billion, twenty million, three hundred twelve thousand, two hundred twenty-one".