404344032121 has 4 divisors (see below), whose sum is σ = 404347530100. Its totient is φ = 404340534144.

The previous prime is 404344032077. The next prime is 404344032133. The reversal of 404344032121 is 121230443404.

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 14981760000 + 389362272121 = 122400^2 + 623989^2 .

It is a cyclic number.

It is not a de Polignac number, because 404344032121 - 2³⁵ = 369984293753 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 404344032121.

It is not an unprimeable number, because it can be changed into a prime (404344032181) 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, 1569456 + ... + 1808833.

It is an arithmetic number, because the mean of its divisors is an integer number (101086882525).

Almost surely, 2^404344032121 is an apocalyptic number.

It is an amenable number.

404344032121 is a deficient number, since it is larger than the sum of its proper divisors (3497979).

404344032121 is a wasteful number, since it uses less digits than its factorization.

404344032121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3497978.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 404344032121 its reverse (121230443404), we get a palindrome (525574475525).

The spelling of 404344032121 in words is "four hundred four billion, three hundred forty-four million, thirty-two thousand, one hundred twenty-one".