211873309103 has 4 divisors (see below), whose sum is σ = 211874230128. Its totient is φ = 211872388080.

The previous prime is 211873309099. The next prime is 211873309121. The reversal of 211873309103 is 301903378112.

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 211873309103 - 2² = 211873309099 is a prime.

It is a super-2 number, since 2×211873309103² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211873309163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209150 + ... + 683732.

It is an arithmetic number, because the mean of its divisors is an integer number (52968557532).

Almost surely, 2^211873309103 is an apocalyptic number.

211873309103 is a deficient number, since it is larger than the sum of its proper divisors (921025).

211873309103 is an equidigital number, since it uses as much as digits as its factorization.

211873309103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921024.

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 211873309103 in words is "two hundred eleven billion, eight hundred seventy-three million, three hundred nine thousand, one hundred three".