404320111421 has 2 divisors, whose sum is σ = 404320111422. Its totient is φ = 404320111420.

The previous prime is 404320111411. The next prime is 404320111469. The reversal of 404320111421 is 124111023404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 295511832100 + 108808279321 = 543610^2 + 329861^2 .

It is a cyclic number.

It is not a de Polignac number, because 404320111421 - 2⁶ = 404320111357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404320111411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202160055710 + 202160055711.

It is an arithmetic number, because the mean of its divisors is an integer number (202160055711).

Almost surely, 2^404320111421 is an apocalyptic number.

It is an amenable number.

404320111421 is a deficient number, since it is larger than the sum of its proper divisors (1).

404320111421 is an equidigital number, since it uses as much as digits as its factorization.

404320111421 is an evil number, because the sum of its binary digits is even.

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

Adding to 404320111421 its reverse (124111023404), we get a palindrome (528431134825).

The spelling of 404320111421 in words is "four hundred four billion, three hundred twenty million, one hundred eleven thousand, four hundred twenty-one".