102404113421 has 4 divisors (see below), whose sum is σ = 103091389500. Its totient is φ = 101716837344.

The previous prime is 102404113403. The next prime is 102404113429. The reversal of 102404113421 is 124311404201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63116512900 + 39287600521 = 251230^2 + 198211^2 .

It is a cyclic number.

It is not a de Polignac number, because 102404113421 - 2²² = 102399919117 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 (102404113429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343637816 + ... + 343638113.

It is an arithmetic number, because the mean of its divisors is an integer number (25772847375).

Almost surely, 2^102404113421 is an apocalyptic number.

It is an amenable number.

102404113421 is a deficient number, since it is larger than the sum of its proper divisors (687276079).

102404113421 is an equidigital number, since it uses as much as digits as its factorization.

102404113421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687276078.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 102404113421 its reverse (124311404201), we get a palindrome (226715517622).

The spelling of 102404113421 in words is "one hundred two billion, four hundred four million, one hundred thirteen thousand, four hundred twenty-one".