6821108103 has 16 divisors (see below), whose sum is σ = 9339963776. Its totient is φ = 4425593760.

The previous prime is 6821108087. The next prime is 6821108113. The reversal of 6821108103 is 3018011286.

It is not a de Polignac number, because 6821108103 - 2⁴ = 6821108087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6821108113) 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 15 ways as a sum of consecutive naturals, for example, 59713 + ... + 131178.

It is an arithmetic number, because the mean of its divisors is an integer number (583747736).

Almost surely, 2^6821108103 is an apocalyptic number.

6821108103 is a deficient number, since it is larger than the sum of its proper divisors (2518855673).

6821108103 is a wasteful number, since it uses less digits than its factorization.

6821108103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191214.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 6821108103 is about 82590.0000181620. Note that the first 4 decimals coincide. The cubic root of 6821108103 is about 1896.4947471211.

Adding to 6821108103 its reverse (3018011286), we get a palindrome (9839119389).

The spelling of 6821108103 in words is "six billion, eight hundred twenty-one million, one hundred eight thousand, one hundred three".