103913330821 has 4 divisors (see below), whose sum is σ = 103926731200. Its totient is φ = 103899930444.

The previous prime is 103913330813. The next prime is 103913330831. The reversal of 103913330821 is 128033319301.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 128033319301 = 15233 ⋅8404997.

It is a cyclic number.

It is not a de Polignac number, because 103913330821 - 2³ = 103913330813 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 (103913330831) 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, 6688551 + ... + 6704068.

It is an arithmetic number, because the mean of its divisors is an integer number (25981682800).

Almost surely, 2^103913330821 is an apocalyptic number.

It is an amenable number.

103913330821 is a deficient number, since it is larger than the sum of its proper divisors (13400379).

103913330821 is an equidigital number, since it uses as much as digits as its factorization.

103913330821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13400378.

The product of its (nonzero) digits is 11664, while the sum is 34.

The spelling of 103913330821 in words is "one hundred three billion, nine hundred thirteen million, three hundred thirty thousand, eight hundred twenty-one".