421012213 has 2 divisors, whose sum is σ = 421012214. Its totient is φ = 421012212.

The previous prime is 421012201. The next prime is 421012219. The reversal of 421012213 is 312210124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419717169 + 1295044 = 20487^2 + 1138^2 .

It is a cyclic number.

It is not a de Polignac number, because 421012213 - 2²¹ = 418915061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421012219) 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, 210506106 + 210506107.

It is an arithmetic number, because the mean of its divisors is an integer number (210506107).

Almost surely, 2^421012213 is an apocalyptic number.

It is an amenable number.

421012213 is a deficient number, since it is larger than the sum of its proper divisors (1).

421012213 is an equidigital number, since it uses as much as digits as its factorization.

421012213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 421012213 is about 20518.5821391245. The cubic root of 421012213 is about 749.4883698737.

Adding to 421012213 its reverse (312210124), we get a palindrome (733222337).

The spelling of 421012213 in words is "four hundred twenty-one million, twelve thousand, two hundred thirteen".