104040232421 has 2 divisors, whose sum is σ = 104040232422. Its totient is φ = 104040232420.

The previous prime is 104040232403. The next prime is 104040232423. The reversal of 104040232421 is 124232040401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62815396900 + 41224835521 = 250630^2 + 203039^2 .

It is a cyclic number.

It is not a de Polignac number, because 104040232421 - 2¹⁴ = 104040216037 is a prime.

Together with 104040232423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104040232423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52020116210 + 52020116211.

It is an arithmetic number, because the mean of its divisors is an integer number (52020116211).

Almost surely, 2^104040232421 is an apocalyptic number.

It is an amenable number.

104040232421 is a deficient number, since it is larger than the sum of its proper divisors (1).

104040232421 is an equidigital number, since it uses as much as digits as its factorization.

104040232421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 104040232421 its reverse (124232040401), we get a palindrome (228272272822).

The spelling of 104040232421 in words is "one hundred four billion, forty million, two hundred thirty-two thousand, four hundred twenty-one".