212414621 has 2 divisors, whose sum is σ = 212414622. Its totient is φ = 212414620.

The previous prime is 212414611. The next prime is 212414639. The reversal of 212414621 is 126414212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152522500 + 59892121 = 12350^2 + 7739^2 .

It is a cyclic number.

It is not a de Polignac number, because 212414621 - 2⁶ = 212414557 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212414611) 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, 106207310 + 106207311.

It is an arithmetic number, because the mean of its divisors is an integer number (106207311).

Almost surely, 2^212414621 is an apocalyptic number.

It is an amenable number.

212414621 is a deficient number, since it is larger than the sum of its proper divisors (1).

212414621 is an equidigital number, since it uses as much as digits as its factorization.

212414621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 23.

The square root of 212414621 is about 14574.4509673607. The cubic root of 212414621 is about 596.6616649429.

Adding to 212414621 its reverse (126414212), we get a palindrome (338828833).

The spelling of 212414621 in words is "two hundred twelve million, four hundred fourteen thousand, six hundred twenty-one".