222122200221 has 12 divisors (see below), whose sum is σ = 324708759648. Its totient is φ = 146297352264.

The previous prime is 222122200213. The next prime is 222122200271. The reversal of 222122200221 is 122002221222.

222122200221 is a `hidden beast` number, since 2 + 221 + 2 + 220 + 0 + 221 = 666.

It is not a de Polignac number, because 222122200221 - 2³ = 222122200213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222122200194 and 222122200203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222122200211) 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, 148675425 + ... + 148676918.

It is an arithmetic number, because the mean of its divisors is an integer number (27059063304).

Almost surely, 2^222122200221 is an apocalyptic number.

It is an amenable number.

222122200221 is a deficient number, since it is larger than the sum of its proper divisors (102586559427).

222122200221 is a wasteful number, since it uses less digits than its factorization.

222122200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297352432 (or 297352429 counting only the distinct ones).

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

Adding to 222122200221 its reverse (122002221222), we get a palindrome (344124421443).

The spelling of 222122200221 in words is "two hundred twenty-two billion, one hundred twenty-two million, two hundred thousand, two hundred twenty-one".