821743411103 has 2 divisors, whose sum is σ = 821743411104. Its totient is φ = 821743411102.

The previous prime is 821743411063. The next prime is 821743411109. The reversal of 821743411103 is 301114347128.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-821743411103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (821743411109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410871705551 + 410871705552.

It is an arithmetic number, because the mean of its divisors is an integer number (410871705552).

Almost surely, 2^821743411103 is an apocalyptic number.

821743411103 is a deficient number, since it is larger than the sum of its proper divisors (1).

821743411103 is an equidigital number, since it uses as much as digits as its factorization.

821743411103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 821743411103 in words is "eight hundred twenty-one billion, seven hundred forty-three million, four hundred eleven thousand, one hundred three".