211131140243 has 4 divisors (see below), whose sum is σ = 211132059408. Its totient is φ = 211130221080.

The previous prime is 211131140219. The next prime is 211131140249. The reversal of 211131140243 is 342041131112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 211131140243 - 2¹⁴ = 211131123859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211131140249) 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, 216005 + ... + 684777.

It is an arithmetic number, because the mean of its divisors is an integer number (52783014852).

Almost surely, 2^211131140243 is an apocalyptic number.

211131140243 is a deficient number, since it is larger than the sum of its proper divisors (919165).

211131140243 is an equidigital number, since it uses as much as digits as its factorization.

211131140243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919164.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 211131140243 its reverse (342041131112), we get a palindrome (553172271355).

The spelling of 211131140243 in words is "two hundred eleven billion, one hundred thirty-one million, one hundred forty thousand, two hundred forty-three".