2011111320 has 64 divisors (see below), whose sum is σ = 6196410720. Its totient is φ = 521800704.

The previous prime is 2011111301. The next prime is 2011111321. The reversal of 2011111320 is 231111102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2011111296 and 2011111305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011111321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222037 + ... + 230916.

Almost surely, 2^2011111320 is an apocalyptic number.

2011111320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011111320 is an abundant number, since it is smaller than the sum of its proper divisors (4185299400).

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

2011111320 is a wasteful number, since it uses less digits than its factorization.

2011111320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453004 (or 453000 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 2011111320 is about 44845.4158192340. The cubic root of 2011111320 is about 1262.2499732960.

Adding to 2011111320 its reverse (231111102), we get a palindrome (2242222422).

The spelling of 2011111320 in words is "two billion, eleven million, one hundred eleven thousand, three hundred twenty".