211204034243 has 4 divisors (see below), whose sum is σ = 211228172328. Its totient is φ = 211179896160.

The previous prime is 211204034227. The next prime is 211204034311. The reversal of 211204034243 is 342430402112.

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 211204034243 - 2⁴ = 211204034227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211204034203) 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, 12055913 + ... + 12073418.

It is an arithmetic number, because the mean of its divisors is an integer number (52807043082).

Almost surely, 2^211204034243 is an apocalyptic number.

211204034243 is a deficient number, since it is larger than the sum of its proper divisors (24138085).

211204034243 is an equidigital number, since it uses as much as digits as its factorization.

211204034243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24138084.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 211204034243 its reverse (342430402112), we get a palindrome (553634436355).

The spelling of 211204034243 in words is "two hundred eleven billion, two hundred four million, thirty-four thousand, two hundred forty-three".