213021302430373 has 2 divisors, whose sum is σ = 213021302430374. Its totient is φ = 213021302430372.

The previous prime is 213021302430347. The next prime is 213021302430449. The reversal of 213021302430373 is 373034203120312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171043317192609 + 41977985237764 = 13078353^2 + 6479042^2 .

It is a cyclic number.

It is not a de Polignac number, because 213021302430373 - 2²⁵ = 213021268875941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213021302439373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106510651215186 + 106510651215187.

It is an arithmetic number, because the mean of its divisors is an integer number (106510651215187).

Almost surely, 2^{213021302430373} is an apocalyptic number.

It is an amenable number.

213021302430373 is a deficient number, since it is larger than the sum of its proper divisors (1).

213021302430373 is an equidigital number, since it uses as much as digits as its factorization.

213021302430373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 34.

Adding to 213021302430373 its reverse (373034203120312), we get a palindrome (586055505550685).

The spelling of 213021302430373 in words is "two hundred thirteen trillion, twenty-one billion, three hundred two million, four hundred thirty thousand, three hundred seventy-three".