222232012181 has 2 divisors, whose sum is σ = 222232012182. Its totient is φ = 222232012180.

The previous prime is 222232012141. The next prime is 222232012207. The reversal of 222232012181 is 181210232222.

It is a happy number.

It is an a-pointer prime, because the next prime (222232012207) can be obtained adding 222232012181 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120298679281 + 101933332900 = 346841^2 + 319270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222232012181 is a prime.

It is a super-2 number, since 2×222232012181² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 222232012181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222232012141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111116006090 + 111116006091.

It is an arithmetic number, because the mean of its divisors is an integer number (111116006091).

Almost surely, 2^222232012181 is an apocalyptic number.

It is an amenable number.

222232012181 is a deficient number, since it is larger than the sum of its proper divisors (1).

222232012181 is an equidigital number, since it uses as much as digits as its factorization.

222232012181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 26.

The spelling of 222232012181 in words is "two hundred twenty-two billion, two hundred thirty-two million, twelve thousand, one hundred eighty-one".