222210220221 has 36 divisors (see below), whose sum is σ = 358781885280. Its totient is φ = 132390231600.

The previous prime is 222210220201. The next prime is 222210220249. The reversal of 222210220221 is 122022012222.

222210220221 is a `hidden beast` number, since 2 + 2 + 221 + 0 + 220 + 221 = 666.

It is not a de Polignac number, because 222210220221 - 2⁷ = 222210220093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222210220194 and 222210220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222210220201) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1664985 + ... + 1793486.

It is an arithmetic number, because the mean of its divisors is an integer number (9966163480).

Almost surely, 2^222210220221 is an apocalyptic number.

It is an amenable number.

222210220221 is a deficient number, since it is larger than the sum of its proper divisors (136571665059).

222210220221 is a wasteful number, since it uses less digits than its factorization.

222210220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3458558 (or 3458544 counting only the distinct ones).

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

Adding to 222210220221 its reverse (122022012222), we get a palindrome (344232232443).

The spelling of 222210220221 in words is "two hundred twenty-two billion, two hundred ten million, two hundred twenty thousand, two hundred twenty-one".