2102311320 has 128 divisors (see below), whose sum is σ = 6689571840. Its totient is φ = 527408640.

The previous prime is 2102311319. The next prime is 2102311331. The reversal of 2102311320 is 231132012.

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 2102311320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162117 + ... + 174603.

It is an arithmetic number, because the mean of its divisors is an integer number (52262280).

Almost surely, 2^2102311320 is an apocalyptic number.

2102311320 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 2102311320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3344785920).

2102311320 is an abundant number, since it is smaller than the sum of its proper divisors (4587260520).

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

2102311320 is a wasteful number, since it uses less digits than its factorization.

2102311320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12585 (or 12581 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2102311320 is about 45850.9685830081. The cubic root of 2102311320 is about 1281.0488067349.

Adding to 2102311320 its reverse (231132012), we get a palindrome (2333443332).

The spelling of 2102311320 in words is "two billion, one hundred two million, three hundred eleven thousand, three hundred twenty".