212212023181 has 2 divisors, whose sum is σ = 212212023182. Its totient is φ = 212212023180.

The previous prime is 212212023157. The next prime is 212212023197. The reversal of 212212023181 is 181320212212.

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., 181079185156 + 31132838025 = 425534^2 + 176445^2 .

It is a cyclic number.

It is not a de Polignac number, because 212212023181 - 2¹⁹ = 212211498893 is a prime.

It is a super-2 number, since 2×212212023181² (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 (212212026181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106106011590 + 106106011591.

It is an arithmetic number, because the mean of its divisors is an integer number (106106011591).

Almost surely, 2^212212023181 is an apocalyptic number.

It is an amenable number.

212212023181 is a deficient number, since it is larger than the sum of its proper divisors (1).

212212023181 is an equidigital number, since it uses as much as digits as its factorization.

212212023181 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.

Adding to 212212023181 its reverse (181320212212), we get a palindrome (393532235393).

It can be divided in two parts, 21221 and 2023181, that added together give a palindrome (2044402).

The spelling of 212212023181 in words is "two hundred twelve billion, two hundred twelve million, twenty-three thousand, one hundred eighty-one".