11111311320 has 64 divisors (see below), whose sum is σ = 33364880640. Its totient is φ = 2960265600.

The previous prime is 11111311319. The next prime is 11111311331. The reversal of 11111311320 is 2311311111.

It is a super-2 number, since 2×11111311320² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11111311320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88485 + ... + 173355.

It is an arithmetic number, because the mean of its divisors is an integer number (521326260).

Almost surely, 2^11111311320 is an apocalyptic number.

11111311320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111311320 is an abundant number, since it is smaller than the sum of its proper divisors (22253569320).

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

11111311320 is a wasteful number, since it uses less digits than its factorization.

11111311320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85976 (or 85972 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 11111311320 its reverse (2311311111), we get a palindrome (13422622431).

The spelling of 11111311320 in words is "eleven billion, one hundred eleven million, three hundred eleven thousand, three hundred twenty".