104234409821 has 2 divisors, whose sum is σ = 104234409822. Its totient is φ = 104234409820.

The previous prime is 104234409817. The next prime is 104234409859. The reversal of 104234409821 is 128904432401.

It is an a-pointer prime, because the next prime (104234409859) can be obtained adding 104234409821 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84207914596 + 20026495225 = 290186^2 + 141515^2 .

It is a cyclic number.

It is not a de Polignac number, because 104234409821 - 2² = 104234409817 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104234409871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52117204910 + 52117204911.

It is an arithmetic number, because the mean of its divisors is an integer number (52117204911).

Almost surely, 2^104234409821 is an apocalyptic number.

It is an amenable number.

104234409821 is a deficient number, since it is larger than the sum of its proper divisors (1).

104234409821 is an equidigital number, since it uses as much as digits as its factorization.

104234409821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 38.

It can be divided in two parts, 10423 and 4409821, that added together give a palindrome (4420244).

The spelling of 104234409821 in words is "one hundred four billion, two hundred thirty-four million, four hundred nine thousand, eight hundred twenty-one".