212125213 has 2 divisors, whose sum is σ = 212125214. Its totient is φ = 212125212.

The previous prime is 212125189. The next prime is 212125223. The reversal of 212125213 is 312521212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192571129 + 19554084 = 13877^2 + 4422^2 .

It is a cyclic number.

It is not a de Polignac number, because 212125213 - 2⁹ = 212124701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212125223) 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, 106062606 + 106062607.

It is an arithmetic number, because the mean of its divisors is an integer number (106062607).

Almost surely, 2^212125213 is an apocalyptic number.

It is an amenable number.

212125213 is a deficient number, since it is larger than the sum of its proper divisors (1).

212125213 is an equidigital number, since it uses as much as digits as its factorization.

212125213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 19.

The square root of 212125213 is about 14564.5189759223. The cubic root of 212125213 is about 596.3905644245.

Adding to 212125213 its reverse (312521212), we get a palindrome (524646425).

The spelling of 212125213 in words is "two hundred twelve million, one hundred twenty-five thousand, two hundred thirteen".