211403620369 has 2 divisors, whose sum is σ = 211403620370. Its totient is φ = 211403620368.

The previous prime is 211403620367. The next prime is 211403620433. The reversal of 211403620369 is 963026304112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171408420225 + 39995200144 = 414015^2 + 199988^2 .

It is a cyclic number.

It is not a de Polignac number, because 211403620369 - 2¹ = 211403620367 is a prime.

It is a super-2 number, since 2×211403620369² (a number of 23 digits) contains 22 as substring.

Together with 211403620367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (211403620367) 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, 105701810184 + 105701810185.

It is an arithmetic number, because the mean of its divisors is an integer number (105701810185).

Almost surely, 2^211403620369 is an apocalyptic number.

It is an amenable number.

211403620369 is a deficient number, since it is larger than the sum of its proper divisors (1).

211403620369 is an equidigital number, since it uses as much as digits as its factorization.

211403620369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 37.

The spelling of 211403620369 in words is "two hundred eleven billion, four hundred three million, six hundred twenty thousand, three hundred sixty-nine".