222112221181 has 2 divisors, whose sum is σ = 222112221182. Its totient is φ = 222112221180.

The previous prime is 222112221179. The next prime is 222112221197. The reversal of 222112221181 is 181122211222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222109551225 + 2669956 = 471285^2 + 1634^2 .

It is a cyclic number.

It is not a de Polignac number, because 222112221181 - 2¹ = 222112221179 is a prime.

It is a super-2 number, since 2×222112221181² (a number of 23 digits) contains 22 as substring.

Together with 222112221179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222112221581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111056110590 + 111056110591.

It is an arithmetic number, because the mean of its divisors is an integer number (111056110591).

Almost surely, 2^222112221181 is an apocalyptic number.

It is an amenable number.

222112221181 is a deficient number, since it is larger than the sum of its proper divisors (1).

222112221181 is an equidigital number, since it uses as much as digits as its factorization.

222112221181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 512, while the sum is 25.

The spelling of 222112221181 in words is "two hundred twenty-two billion, one hundred twelve million, two hundred twenty-one thousand, one hundred eighty-one".