222101232181 has 2 divisors, whose sum is σ = 222101232182. Its totient is φ = 222101232180.

The previous prime is 222101232167. The next prime is 222101232247. The reversal of 222101232181 is 181232101222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114822711025 + 107278521156 = 338855^2 + 327534^2 .

It is a cyclic number.

It is not a de Polignac number, because 222101232181 - 2¹¹ = 222101230133 is a prime.

It is a super-2 number, since 2×222101232181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222101232781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111050616090 + 111050616091.

It is an arithmetic number, because the mean of its divisors is an integer number (111050616091).

Almost surely, 2^222101232181 is an apocalyptic number.

It is an amenable number.

222101232181 is a deficient number, since it is larger than the sum of its proper divisors (1).

222101232181 is an equidigital number, since it uses as much as digits as its factorization.

222101232181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 25.

The spelling of 222101232181 in words is "two hundred twenty-two billion, one hundred one million, two hundred thirty-two thousand, one hundred eighty-one".