11111031320 has 32 divisors (see below), whose sum is σ = 25167618000. Its totient is φ = 4414581888.

The previous prime is 11111031289. The next prime is 11111031341. The reversal of 11111031320 is 2313011111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11111031295 and 11111031304.

It is a congruent number.

It is an unprimeable number.

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, 926174 + ... + 938093.

Almost surely, 2^11111031320 is an apocalyptic number.

11111031320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111031320 is an abundant number, since it is smaller than the sum of its proper divisors (14056586680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11111031320 is a wasteful number, since it uses less digits than its factorization.

11111031320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864427 (or 1864423 counting only the distinct ones).

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

Adding to 11111031320 its reverse (2313011111), we get a palindrome (13424042431).

The spelling of 11111031320 in words is "eleven billion, one hundred eleven million, thirty-one thousand, three hundred twenty".