222221002221 has 24 divisors (see below), whose sum is σ = 330204585984. Its totient is φ = 143905753440.

The previous prime is 222221002183. The next prime is 222221002253. The reversal of 222221002221 is 122200122222.

222221002221 is a `hidden beast` number, since 222 + 221 + 0 + 0 + 2 + 221 = 666.

It is not a de Polignac number, because 222221002221 - 2¹⁷ = 222220871149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222221002194 and 222221002203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221002121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 347565 + ... + 751826.

It is an arithmetic number, because the mean of its divisors is an integer number (13758524416).

Almost surely, 2^222221002221 is an apocalyptic number.

It is an amenable number.

222221002221 is a deficient number, since it is larger than the sum of its proper divisors (107983583763).

222221002221 is a wasteful number, since it uses less digits than its factorization.

222221002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100041 (or 1100038 counting only the distinct ones).

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

Adding to 222221002221 its reverse (122200122222), we get a palindrome (344421124443).

The spelling of 222221002221 in words is "two hundred twenty-two billion, two hundred twenty-one million, two thousand, two hundred twenty-one".