404121331 has 4 divisors (see below), whose sum is σ = 427893192. Its totient is φ = 380349472.

The previous prime is 404121307. The next prime is 404121371. The reversal of 404121331 is 133121404.

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

It is a cyclic number.

It is not a de Polignac number, because 404121331 - 2⁵ = 404121299 is a prime.

It is a super-2 number, since 2×404121331² = 326628100338423122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404121299 and 404121308.

It is not an unprimeable number, because it can be changed into a prime (404121371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11885905 + ... + 11885938.

It is an arithmetic number, because the mean of its divisors is an integer number (106973298).

Almost surely, 2^404121331 is an apocalyptic number.

404121331 is a deficient number, since it is larger than the sum of its proper divisors (23771861).

404121331 is a wasteful number, since it uses less digits than its factorization.

404121331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23771860.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 404121331 is about 20102.7692370977. The cubic root of 404121331 is about 739.3281770849.

Adding to 404121331 its reverse (133121404), we get a palindrome (537242735).

The spelling of 404121331 in words is "four hundred four million, one hundred twenty-one thousand, three hundred thirty-one".