211131203243 has 2 divisors, whose sum is σ = 211131203244. Its totient is φ = 211131203242.

The previous prime is 211131203233. The next prime is 211131203273. The reversal of 211131203243 is 342302131112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211131203243 - 2⁸ = 211131202987 is a prime.

It is not a weakly prime, because it can be changed into another prime (211131203233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105565601621 + 105565601622.

It is an arithmetic number, because the mean of its divisors is an integer number (105565601622).

Almost surely, 2^211131203243 is an apocalyptic number.

211131203243 is a deficient number, since it is larger than the sum of its proper divisors (1).

211131203243 is an equidigital number, since it uses as much as digits as its factorization.

211131203243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 211131203243 its reverse (342302131112), we get a palindrome (553433334355).

The spelling of 211131203243 in words is "two hundred eleven billion, one hundred thirty-one million, two hundred three thousand, two hundred forty-three".