211203230243 has 4 divisors (see below), whose sum is σ = 220385979408. Its totient is φ = 202020481080.

The previous prime is 211203230221. The next prime is 211203230309. The reversal of 211203230243 is 342032302112.

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 211203230243 - 2⁶ = 211203230179 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 9182749141 = 211203230243 / (2 + 1 + 1 + 2 + 0 + 3 + 2 + 3 + 0 + 2 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211203230213) 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, 4591374548 + ... + 4591374593.

It is an arithmetic number, because the mean of its divisors is an integer number (55096494852).

Almost surely, 2^211203230243 is an apocalyptic number.

211203230243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

211203230243 is a deficient number, since it is larger than the sum of its proper divisors (9182749165).

211203230243 is an equidigital number, since it uses as much as digits as its factorization.

211203230243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9182749164.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 211203230243 its reverse (342032302112), we get a palindrome (553235532355).

The spelling of 211203230243 in words is "two hundred eleven billion, two hundred three million, two hundred thirty thousand, two hundred forty-three".