2311321120 has 96 divisors (see below), whose sum is σ = 5761082880. Its totient is φ = 873861120.

The previous prime is 2311321087. The next prime is 2311321151. The reversal of 2311321120 is 211231132.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 2311321094 and 2311321103.

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, 2623080 + ... + 2623960.

It is an arithmetic number, because the mean of its divisors is an integer number (60011280).

Almost surely, 2^2311321120 is an apocalyptic number.

2311321120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2311321120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2880541440).

2311321120 is an abundant number, since it is smaller than the sum of its proper divisors (3449761760).

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

2311321120 is a wasteful number, since it uses less digits than its factorization.

2311321120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778 (or 1770 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2311321120 is about 48076.2011810417. The cubic root of 2311321120 is about 1322.1683675021.

Adding to 2311321120 its reverse (211231132), we get a palindrome (2522552252).

The spelling of 2311321120 in words is "two billion, three hundred eleven million, three hundred twenty-one thousand, one hundred twenty".