222112221221 has 8 divisors (see below), whose sum is σ = 246411093600. Its totient is φ = 198497824240.

The previous prime is 222112221197. The next prime is 222112221223. The reversal of 222112221221 is 122122211222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222112221221 - 2³⁰ = 221038479397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222112221193 and 222112221202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222112221223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171118166 + ... + 171119463.

It is an arithmetic number, because the mean of its divisors is an integer number (30801386700).

Almost surely, 2^222112221221 is an apocalyptic number.

It is an amenable number.

222112221221 is a deficient number, since it is larger than the sum of its proper divisors (24298872379).

222112221221 is a wasteful number, since it uses less digits than its factorization.

222112221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342237699.

The product of its digits is 256, while the sum is 20.

Adding to 222112221221 its reverse (122122211222), we get a palindrome (344234432443).

Subtracting from 222112221221 its reverse (122122211222), we obtain a palindrome (99990009999).

The spelling of 222112221221 in words is "two hundred twenty-two billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twenty-one".