104821187821 has 8 divisors (see below), whose sum is σ = 120237695744. Its totient is φ = 89515193040.

The previous prime is 104821187813. The next prime is 104821187831. The reversal of 104821187821 is 128781128401.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 104821187821 - 2³ = 104821187813 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 (104821187831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27626250 + ... + 27630043.

It is an arithmetic number, because the mean of its divisors is an integer number (15029711968).

Almost surely, 2^104821187821 is an apocalyptic number.

It is an amenable number.

104821187821 is a deficient number, since it is larger than the sum of its proper divisors (15416507923).

104821187821 is an equidigital number, since it uses as much as digits as its factorization.

104821187821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55256571.

The product of its (nonzero) digits is 57344, while the sum is 43.

The spelling of 104821187821 in words is "one hundred four billion, eight hundred twenty-one million, one hundred eighty-seven thousand, eight hundred twenty-one".