211421044243 has 4 divisors (see below), whose sum is σ = 211422067560. Its totient is φ = 211420020928.

The previous prime is 211421044207. The next prime is 211421044279. The reversal of 211421044243 is 342440124112.

211421044243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (211421044207) and next prime (211421044279).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211421044243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211421044343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80830 + ... + 655267.

It is an arithmetic number, because the mean of its divisors is an integer number (52855516890).

Almost surely, 2^211421044243 is an apocalyptic number.

211421044243 is a deficient number, since it is larger than the sum of its proper divisors (1023317).

211421044243 is an equidigital number, since it uses as much as digits as its factorization.

211421044243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023316.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 211421044243 its reverse (342440124112), we get a palindrome (553861168355).

The spelling of 211421044243 in words is "two hundred eleven billion, four hundred twenty-one million, forty-four thousand, two hundred forty-three".