11404131221 has 4 divisors (see below), whose sum is σ = 13033292832. Its totient is φ = 9774969612.

The previous prime is 11404131173. The next prime is 11404131251. The reversal of 11404131221 is 12213140411.

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 11404131221 - 2¹⁴ = 11404114837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11404131193 and 11404131202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11404131251) 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, 814580795 + ... + 814580808.

It is an arithmetic number, because the mean of its divisors is an integer number (3258323208).

Almost surely, 2^11404131221 is an apocalyptic number.

It is an amenable number.

11404131221 is a deficient number, since it is larger than the sum of its proper divisors (1629161611).

11404131221 is an equidigital number, since it uses as much as digits as its factorization.

11404131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629161610.

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

Adding to 11404131221 its reverse (12213140411), we get a palindrome (23617271632).

The spelling of 11404131221 in words is "eleven billion, four hundred four million, one hundred thirty-one thousand, two hundred twenty-one".