11404320221 has 20 divisors (see below), whose sum is σ = 13367895744. Its totient is φ = 9728371800.

The previous prime is 11404320211. The next prime is 11404320223. The reversal of 11404320221 is 12202340411.

It is not a de Polignac number, because 11404320221 - 2¹⁴ = 11404303837 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11404320193 and 11404320202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11404320223) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 495356 + ... + 517866.

Almost surely, 2^11404320221 is an apocalyptic number.

It is an amenable number.

11404320221 is a deficient number, since it is larger than the sum of its proper divisors (1963575523).

11404320221 is an frugal number, since it uses more digits than its factorization.

11404320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22750 (or 22729 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 11404320221 its reverse (12202340411), we get a palindrome (23606660632).

The spelling of 11404320221 in words is "eleven billion, four hundred four million, three hundred twenty thousand, two hundred twenty-one".