104116685427821 has 4 divisors (see below), whose sum is σ = 113581838648544. Its totient is φ = 94651532207100.

The previous prime is 104116685427767. The next prime is 104116685427829. The reversal of 104116685427821 is 128724586611401.

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.

It is a de Polignac number, because none of the positive numbers 2^k-104116685427821 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 (104116685427829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4732576610345 + ... + 4732576610366.

It is an arithmetic number, because the mean of its divisors is an integer number (28395459662136).

Almost surely, 2^{104116685427821} is an apocalyptic number.

104116685427821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

104116685427821 is a deficient number, since it is larger than the sum of its proper divisors (9465153220723).

104116685427821 is an equidigital number, since it uses as much as digits as its factorization.

104116685427821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9465153220722.

The product of its (nonzero) digits is 5160960, while the sum is 56.

The spelling of 104116685427821 in words is "one hundred four trillion, one hundred sixteen billion, six hundred eighty-five million, four hundred twenty-seven thousand, eight hundred twenty-one".