222002212221 has 24 divisors (see below), whose sum is σ = 337846496000. Its totient is φ = 140087610432.

The previous prime is 222002212171. The next prime is 222002212249. The reversal of 222002212221 is 122212200222.

222002212221 is a `hidden beast` number, since 2 + 220 + 0 + 221 + 2 + 221 = 666.

It is not a de Polignac number, because 222002212221 - 2¹³ = 222002204029 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 222002212194 and 222002212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222002212261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 381901 + ... + 768018.

Almost surely, 2^222002212221 is an apocalyptic number.

It is an amenable number.

222002212221 is a deficient number, since it is larger than the sum of its proper divisors (115844283779).

222002212221 is a wasteful number, since it uses less digits than its factorization.

222002212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151073 (or 1151070 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 222002212221 its reverse (122212200222), we get a palindrome (344214412443).

The spelling of 222002212221 in words is "two hundred twenty-two billion, two million, two hundred twelve thousand, two hundred twenty-one".