212213129 has 2 divisors, whose sum is σ = 212213130. Its totient is φ = 212213128.

The previous prime is 212213077. The next prime is 212213143. The reversal of 212213129 is 921312212.

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., 169702729 + 42510400 = 13027^2 + 6520^2 .

It is a cyclic number.

It is not a de Polignac number, because 212213129 - 2⁸ = 212212873 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (212213149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106106564 + 106106565.

It is an arithmetic number, because the mean of its divisors is an integer number (106106565).

Almost surely, 2^212213129 is an apocalyptic number.

It is an amenable number.

212213129 is a deficient number, since it is larger than the sum of its proper divisors (1).

212213129 is an equidigital number, since it uses as much as digits as its factorization.

212213129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 23.

The square root of 212213129 is about 14567.5368199294. The cubic root of 212213129 is about 596.4729450622.

It can be divided in two parts, 2122 and 13129, that added together give a palindrome (15251).

The spelling of 212213129 in words is "two hundred twelve million, two hundred thirteen thousand, one hundred twenty-nine".