222102211221 has 32 divisors (see below), whose sum is σ = 361330314240. Its totient is φ = 133715934000.

The previous prime is 222102211193. The next prime is 222102211241. The reversal of 222102211221 is 122112201222.

It is a happy number.

222102211221 is a `hidden beast` number, since 2 + 221 + 0 + 221 + 1 + 221 = 666.

It is not a de Polignac number, because 222102211221 - 2¹⁵ = 222102178453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222102211194 and 222102211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222102211241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2431375 + ... + 2521068.

It is an arithmetic number, because the mean of its divisors is an integer number (11291572320).

Almost surely, 2^222102211221 is an apocalyptic number.

It is an amenable number.

222102211221 is a deficient number, since it is larger than the sum of its proper divisors (139228103019).

222102211221 is a wasteful number, since it uses less digits than its factorization.

222102211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4952614 (or 4952608 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222102211221 its reverse (122112201222), we get a palindrome (344214412443).

Subtracting from 222102211221 its reverse (122112201222), we obtain a palindrome (99990009999).

The spelling of 222102211221 in words is "two hundred twenty-two billion, one hundred two million, two hundred eleven thousand, two hundred twenty-one".