11404121321 has 4 divisors (see below), whose sum is σ = 11404673412. Its totient is φ = 11403569232.

The previous prime is 11404121299. The next prime is 11404121359. The reversal of 11404121321 is 12312140411.

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 2073527296 + 9330594025 = 45536^2 + 96595^2 .

It is a cyclic number.

It is not a de Polignac number, because 11404121321 - 2²² = 11399927017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11404121293 and 11404121302.

It is not an unprimeable number, because it can be changed into a prime (11404121021) 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, 243806 + ... + 286791.

It is an arithmetic number, because the mean of its divisors is an integer number (2851168353).

Almost surely, 2^11404121321 is an apocalyptic number.

It is an amenable number.

11404121321 is a deficient number, since it is larger than the sum of its proper divisors (552091).

11404121321 is an equidigital number, since it uses as much as digits as its factorization.

11404121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552090.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 11404121321 its reverse (12312140411), we get a palindrome (23716261732).

The spelling of 11404121321 in words is "eleven billion, four hundred four million, one hundred twenty-one thousand, three hundred twenty-one".