404401421231 has 2 divisors, whose sum is σ = 404401421232. Its totient is φ = 404401421230.

The previous prime is 404401421189. The next prime is 404401421233. The reversal of 404401421231 is 132124104404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 404401421231 - 2¹⁰ = 404401420207 is a prime.

It is a super-2 number, since 2×404401421231² (a number of 24 digits) contains 22 as substring.

Together with 404401421233, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 404401421231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404401421233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202200710615 + 202200710616.

It is an arithmetic number, because the mean of its divisors is an integer number (202200710616).

Almost surely, 2^404401421231 is an apocalyptic number.

404401421231 is a deficient number, since it is larger than the sum of its proper divisors (1).

404401421231 is an equidigital number, since it uses as much as digits as its factorization.

404401421231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 404401421231 its reverse (132124104404), we get a palindrome (536525525635).

The spelling of 404401421231 in words is "four hundred four billion, four hundred one million, four hundred twenty-one thousand, two hundred thirty-one".