2121333320 has 16 divisors (see below), whose sum is σ = 4773000060. Its totient is φ = 848533312.

The previous prime is 2121333301. The next prime is 2121333329. The reversal of 2121333320 is 233331212.

It can be written as a sum of positive squares in 2 ways, for example, as 2120970916 + 362404 = 46054^2 + 602^2 .

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 = 2121333292 and 2121333301.

It is not an unprimeable number, because it can be changed into a prime (2121333329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26516627 + ... + 26516706.

Almost surely, 2^2121333320 is an apocalyptic number.

2121333320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121333320 is an abundant number, since it is smaller than the sum of its proper divisors (2651666740).

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

2121333320 is a wasteful number, since it uses less digits than its factorization.

2121333320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53033344 (or 53033340 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 2121333320 is about 46057.9343870304. The cubic root of 2121333320 is about 1284.9009133930.

Adding to 2121333320 its reverse (233331212), we get a palindrome (2354664532).

The spelling of 2121333320 in words is "two billion, one hundred twenty-one million, three hundred thirty-three thousand, three hundred twenty".