104820412821 has 4 divisors (see below), whose sum is σ = 139760550432. Its totient is φ = 69880275212.

The previous prime is 104820412799. The next prime is 104820412831. The reversal of 104820412821 is 128214028401.

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: 128214028401 = 3 ⋅42738009467.

It is a cyclic number.

It is not a de Polignac number, because 104820412821 - 2¹⁰ = 104820411797 is a prime.

It is a super-2 number, since 2×104820412821² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104820412831) 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, 17470068801 + ... + 17470068806.

It is an arithmetic number, because the mean of its divisors is an integer number (34940137608).

Almost surely, 2^104820412821 is an apocalyptic number.

It is an amenable number.

104820412821 is a deficient number, since it is larger than the sum of its proper divisors (34940137611).

104820412821 is an equidigital number, since it uses as much as digits as its factorization.

104820412821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34940137610.

The product of its (nonzero) digits is 8192, while the sum is 33.

The spelling of 104820412821 in words is "one hundred four billion, eight hundred twenty million, four hundred twelve thousand, eight hundred twenty-one".