213244605333421 has 2 divisors, whose sum is σ = 213244605333422. Its totient is φ = 213244605333420.

The previous prime is 213244605333371. The next prime is 213244605333457. The reversal of 213244605333421 is 124333506442312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167468704540900 + 45775900792521 = 12940970^2 + 6765789^2 .

It is a cyclic number.

It is not a de Polignac number, because 213244605333421 - 2⁷ = 213244605333293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213244605333521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106622302666710 + 106622302666711.

It is an arithmetic number, because the mean of its divisors is an integer number (106622302666711).

Almost surely, 2^{213244605333421} is an apocalyptic number.

It is an amenable number.

213244605333421 is a deficient number, since it is larger than the sum of its proper divisors (1).

213244605333421 is an equidigital number, since it uses as much as digits as its factorization.

213244605333421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 43.

The spelling of 213244605333421 in words is "two hundred thirteen trillion, two hundred forty-four billion, six hundred five million, three hundred thirty-three thousand, four hundred twenty-one".