11023013231 has 4 divisors (see below), whose sum is σ = 11671425792. Its totient is φ = 10374600672.

The previous prime is 11023013173. The next prime is 11023013237. The reversal of 11023013231 is 13231032011.

11023013231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11023013231 is a prime.

It is a super-3 number, since 3×11023013231³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 648412543 = 11023013231 / (1 + 1 + 0 + 2 + 3 + 0 + 1 + 3 + 2 + 3 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11023013237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324206255 + ... + 324206288.

It is an arithmetic number, because the mean of its divisors is an integer number (2917856448).

Almost surely, 2^11023013231 is an apocalyptic number.

11023013231 is a deficient number, since it is larger than the sum of its proper divisors (648412561).

11023013231 is an equidigital number, since it uses as much as digits as its factorization.

11023013231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648412560.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 11023013231 its reverse (13231032011), we get a palindrome (24254045242).

The spelling of 11023013231 in words is "eleven billion, twenty-three million, thirteen thousand, two hundred thirty-one".