212223223181 has 2 divisors, whose sum is σ = 212223223182. Its totient is φ = 212223223180.

The previous prime is 212223223087. The next prime is 212223223189. The reversal of 212223223181 is 181322322212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136345562500 + 75877660681 = 369250^2 + 275459^2 .

It is a cyclic number.

It is not a de Polignac number, because 212223223181 - 2³⁴ = 195043353997 is a prime.

It is a super-2 number, since 2×212223223181² (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 (212223223189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106111611590 + 106111611591.

It is an arithmetic number, because the mean of its divisors is an integer number (106111611591).

Almost surely, 2^212223223181 is an apocalyptic number.

It is an amenable number.

212223223181 is a deficient number, since it is larger than the sum of its proper divisors (1).

212223223181 is an equidigital number, since it uses as much as digits as its factorization.

212223223181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 29.

Adding to 212223223181 its reverse (181322322212), we get a palindrome (393545545393).

The spelling of 212223223181 in words is "two hundred twelve billion, two hundred twenty-three million, two hundred twenty-three thousand, one hundred eighty-one".