211401964799 has 2 divisors, whose sum is σ = 211401964800. Its totient is φ = 211401964798.

The previous prime is 211401964793. The next prime is 211401964811. The reversal of 211401964799 is 997469104112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211401964799 - 2⁴ = 211401964783 is a prime.

It is a super-2 number, since 2×211401964799² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211401964799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211401964793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105700982399 + 105700982400.

It is an arithmetic number, because the mean of its divisors is an integer number (105700982400).

Almost surely, 2^211401964799 is an apocalyptic number.

211401964799 is a deficient number, since it is larger than the sum of its proper divisors (1).

211401964799 is an equidigital number, since it uses as much as digits as its factorization.

211401964799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 53.

The spelling of 211401964799 in words is "two hundred eleven billion, four hundred one million, nine hundred sixty-four thousand, seven hundred ninety-nine".