11404559921 has 4 divisors (see below), whose sum is σ = 11405553252. Its totient is φ = 11403566592.

The previous prime is 11404559911. The next prime is 11404559953. The reversal of 11404559921 is 12995540411.

11404559921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1206589696 + 10197970225 = 34736^2 + 100985^2 .

It is a cyclic number.

It is not a de Polignac number, because 11404559921 - 2²⁶ = 11337451057 is a prime.

It is a super-3 number, since 3×11404559921³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11404559911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479240 + ... + 502473.

It is an arithmetic number, because the mean of its divisors is an integer number (2851388313).

Almost surely, 2^11404559921 is an apocalyptic number.

It is an amenable number.

11404559921 is a deficient number, since it is larger than the sum of its proper divisors (993331).

11404559921 is an equidigital number, since it uses as much as digits as its factorization.

11404559921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993330.

The product of its (nonzero) digits is 64800, while the sum is 41.

The spelling of 11404559921 in words is "eleven billion, four hundred four million, five hundred fifty-nine thousand, nine hundred twenty-one".