11404444421 has 4 divisors (see below), whose sum is σ = 11682601644. Its totient is φ = 11126287200.

The previous prime is 11404444397. The next prime is 11404444439. The reversal of 11404444421 is 12444440411.

It is a happy number.

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 3719292196 + 7685152225 = 60986^2 + 87665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11404444421 is a prime.

It is a super-2 number, since 2×11404444421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11404444321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139078550 + ... + 139078631.

It is an arithmetic number, because the mean of its divisors is an integer number (2920650411).

Almost surely, 2^11404444421 is an apocalyptic number.

It is an amenable number.

11404444421 is a deficient number, since it is larger than the sum of its proper divisors (278157223).

11404444421 is an equidigital number, since it uses as much as digits as its factorization.

11404444421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278157222.

The product of its (nonzero) digits is 8192, while the sum is 29.

Adding to 11404444421 its reverse (12444440411), we get a palindrome (23848884832).

The spelling of 11404444421 in words is "eleven billion, four hundred four million, four hundred forty-four thousand, four hundred twenty-one".