11320431331 has 4 divisors (see below), whose sum is σ = 12349561464. Its totient is φ = 10291301200.

The previous prime is 11320431299. The next prime is 11320431349. The reversal of 11320431331 is 13313402311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11320431331 - 2⁵ = 11320431299 is a prime.

It is a super-2 number, since 2×11320431331² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11320431361) 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, 514565050 + ... + 514565071.

It is an arithmetic number, because the mean of its divisors is an integer number (3087390366).

Almost surely, 2^11320431331 is an apocalyptic number.

11320431331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11320431331 is a deficient number, since it is larger than the sum of its proper divisors (1029130133).

11320431331 is a wasteful number, since it uses less digits than its factorization.

11320431331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029130132.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 11320431331 its reverse (13313402311), we get a palindrome (24633833642).

The spelling of 11320431331 in words is "eleven billion, three hundred twenty million, four hundred thirty-one thousand, three hundred thirty-one".