404032313021 has 4 divisors (see below), whose sum is σ = 404697935232. Its totient is φ = 403366690812.

The previous prime is 404032312993. The next prime is 404032313099. The reversal of 404032313021 is 120313230404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 404032313021 - 2²⁶ = 403965204157 is a prime.

It is a super-2 number, since 2×404032313021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404032313621) 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, 332810195 + ... + 332811408.

It is an arithmetic number, because the mean of its divisors is an integer number (101174483808).

Almost surely, 2^404032313021 is an apocalyptic number.

It is an amenable number.

404032313021 is a deficient number, since it is larger than the sum of its proper divisors (665622211).

404032313021 is an equidigital number, since it uses as much as digits as its factorization.

404032313021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665622210.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 404032313021 its reverse (120313230404), we get a palindrome (524345543425).

The spelling of 404032313021 in words is "four hundred four billion, thirty-two million, three hundred thirteen thousand, twenty-one".