222202200001221 has 12 divisors (see below), whose sum is σ = 350136800002080. Its totient is φ = 134668000000680.

The previous prime is 222202200001151. The next prime is 222202200001247. The reversal of 222202200001221 is 122100002202222.

222202200001221 is a `hidden beast` number, since 2 + 2 + 220 + 220 + 0 + 0 + 0 + 1 + 221 = 666.

222202200001221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 222202200001221 - 2⁹ = 222202200000709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222202200001194 and 222202200001203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222202200002221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1122233333241 + ... + 1122233333438.

It is an arithmetic number, because the mean of its divisors is an integer number (29178066666840).

Almost surely, 2^{222202200001221} is an apocalyptic number.

It is an amenable number.

222202200001221 is a deficient number, since it is larger than the sum of its proper divisors (127934600000859).

222202200001221 is a wasteful number, since it uses less digits than its factorization.

222202200001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244466666696 (or 2244466666693 counting only the distinct ones).

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

Adding to 222202200001221 its reverse (122100002202222), we get a palindrome (344302202203443).

The spelling of 222202200001221 in words is "two hundred twenty-two trillion, two hundred two billion, two hundred million, one thousand, two hundred twenty-one".