2721320120 has 32 divisors (see below), whose sum is σ = 6320488320. Its totient is φ = 1053413760.

The previous prime is 2721320111. The next prime is 2721320143. The reversal of 2721320120 is 210231272.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2721320092 and 2721320101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1096067 + ... + 1098546.

It is an arithmetic number, because the mean of its divisors is an integer number (197515260).

Almost surely, 2^2721320120 is an apocalyptic number.

2721320120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2721320120 is an abundant number, since it is smaller than the sum of its proper divisors (3599168200).

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

2721320120 is a wasteful number, since it uses less digits than its factorization.

2721320120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2194655 (or 2194651 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 2721320120 is about 52166.2737791382. The cubic root of 2721320120 is about 1396.1322017749.

Adding to 2721320120 its reverse (210231272), we get a palindrome (2931551392).

The spelling of 2721320120 in words is "two billion, seven hundred twenty-one million, three hundred twenty thousand, one hundred twenty".