210964338721 has 2 divisors, whose sum is σ = 210964338722. Its totient is φ = 210964338720.

The previous prime is 210964338709. The next prime is 210964338737. The reversal of 210964338721 is 127833469012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110465828496 + 100498510225 = 332364^2 + 317015^2 .

It is a cyclic number.

It is not a de Polignac number, because 210964338721 - 2³⁷ = 73525385249 is a prime.

It is not a weakly prime, because it can be changed into another prime (210964335721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105482169360 + 105482169361.

It is an arithmetic number, because the mean of its divisors is an integer number (105482169361).

Almost surely, 2^210964338721 is an apocalyptic number.

It is an amenable number.

210964338721 is a deficient number, since it is larger than the sum of its proper divisors (1).

210964338721 is an equidigital number, since it uses as much as digits as its factorization.

210964338721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 210964338721 in words is "two hundred ten billion, nine hundred sixty-four million, three hundred thirty-eight thousand, seven hundred twenty-one".