2102021320 has 64 divisors (see below), whose sum is σ = 5496854400. Its totient is φ = 708472320.

The previous prime is 2102021303. The next prime is 2102021329. The reversal of 2102021320 is 231202012.

It is a self number, because there is not a number n which added to its sum of digits gives 2102021320.

It is not an unprimeable number, because it can be changed into a prime (2102021329) 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, 47101 + ... + 80140.

It is an arithmetic number, because the mean of its divisors is an integer number (85888350).

Almost surely, 2^2102021320 is an apocalyptic number.

2102021320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102021320 is an abundant number, since it is smaller than the sum of its proper divisors (3394833080).

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

2102021320 is a wasteful number, since it uses less digits than its factorization.

2102021320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127318 (or 127314 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2102021320 is about 45847.8060543795. The cubic root of 2102021320 is about 1280.9898999444.

Adding to 2102021320 its reverse (231202012), we get a palindrome (2333223332).

The spelling of 2102021320 in words is "two billion, one hundred two million, twenty-one thousand, three hundred twenty".