2130021320 has 128 divisors (see below), whose sum is σ = 5590252800. Its totient is φ = 715392000.

The previous prime is 2130021259. The next prime is 2130021323. The reversal of 2130021320 is 231200312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 2130021295 and 2130021304.

It is not an unprimeable number, because it can be changed into a prime (2130021323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3082175 + ... + 3082865.

It is an arithmetic number, because the mean of its divisors is an integer number (43673850).

Almost surely, 2^2130021320 is an apocalyptic number.

2130021320 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 2130021320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2795126400).

2130021320 is an abundant number, since it is smaller than the sum of its proper divisors (3460231480).

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

2130021320 is a wasteful number, since it uses less digits than its factorization.

2130021320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919 (or 915 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2130021320 is about 46152.1540125702. The cubic root of 2130021320 is about 1286.6526440643.

Adding to 2130021320 its reverse (231200312), we get a palindrome (2361221632).

The spelling of 2130021320 in words is "two billion, one hundred thirty million, twenty-one thousand, three hundred twenty".