222002323221 has 16 divisors (see below), whose sum is σ = 338296329728. Its totient is φ = 126855817200.

The previous prime is 222002323217. The next prime is 222002323223. The reversal of 222002323221 is 122323200222.

It is not a de Polignac number, because 222002323221 - 2² = 222002323217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222002323223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1392966 + ... + 1544136.

It is an arithmetic number, because the mean of its divisors is an integer number (21143520608).

Almost surely, 2^222002323221 is an apocalyptic number.

222002323221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222002323221 is a deficient number, since it is larger than the sum of its proper divisors (116294006507).

222002323221 is a wasteful number, since it uses less digits than its factorization.

222002323221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221112.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 222002323221 its reverse (122323200222), we get a palindrome (344325523443).

The spelling of 222002323221 in words is "two hundred twenty-two billion, two million, three hundred twenty-three thousand, two hundred twenty-one".