11431121 has 8 divisors (see below), whose sum is σ = 12344640. Its totient is φ = 10522512.

The previous prime is 11431111. The next prime is 11431129. The reversal of 11431121 is 12113411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-11431121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11431096 and 11431105.

It is not an unprimeable number, because it can be changed into a prime (11431129) 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 7 ways as a sum of consecutive naturals, for example, 4706 + ... + 6708.

It is an arithmetic number, because the mean of its divisors is an integer number (1543080).

Almost surely, 2^11431121 is an apocalyptic number.

It is an amenable number.

11431121 is a deficient number, since it is larger than the sum of its proper divisors (913519).

11431121 is a wasteful number, since it uses less digits than its factorization.

11431121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455.

The product of its digits is 24, while the sum is 14.

The square root of 11431121 is about 3380.9940845852. The cubic root of 11431121 is about 225.2663249649.

Adding to 11431121 its reverse (12113411), we get a palindrome (23544532).

The spelling of 11431121 in words is "eleven million, four hundred thirty-one thousand, one hundred twenty-one".