11320111031 has 4 divisors (see below), whose sum is σ = 11320755864. Its totient is φ = 11319466200.

The previous prime is 11320111009. The next prime is 11320111177. The reversal of 11320111031 is 13011102311.

It is a happy number.

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 11320111031 - 2¹⁸ = 11319848887 is a prime.

It is a super-2 number, since 2×11320111031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11320110997 and 11320111015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11320114031) 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, 295325 + ... + 331446.

It is an arithmetic number, because the mean of its divisors is an integer number (2830188966).

Almost surely, 2^11320111031 is an apocalyptic number.

11320111031 is a deficient number, since it is larger than the sum of its proper divisors (644833).

11320111031 is an equidigital number, since it uses as much as digits as its factorization.

11320111031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644832.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 11320111031 its reverse (13011102311), we get a palindrome (24331213342).

The spelling of 11320111031 in words is "eleven billion, three hundred twenty million, one hundred eleven thousand, thirty-one".