211200013243 has 4 divisors (see below), whose sum is σ = 218012916928. Its totient is φ = 204387109560.

The previous prime is 211200013237. The next prime is 211200013261. The reversal of 211200013243 is 342310002112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211200013243 - 2³³ = 202610078651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211200013243.

It is not an unprimeable number, because it can be changed into a prime (211200016243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3406451796 + ... + 3406451857.

It is an arithmetic number, because the mean of its divisors is an integer number (54503229232).

Almost surely, 2^211200013243 is an apocalyptic number.

211200013243 is a deficient number, since it is larger than the sum of its proper divisors (6812903685).

211200013243 is an equidigital number, since it uses as much as digits as its factorization.

211200013243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6812903684.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 211200013243 its reverse (342310002112), we get a palindrome (553510015355).

The spelling of 211200013243 in words is "two hundred eleven billion, two hundred million, thirteen thousand, two hundred forty-three".