2123211300 has 144 divisors (see below), whose sum is σ = 7043299200. Its totient is φ = 483747840.

The previous prime is 2123211289. The next prime is 2123211313. The reversal of 2123211300 is 31123212.

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 2123211300.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 731452 + ... + 734348.

It is an arithmetic number, because the mean of its divisors is an integer number (48911800).

Almost surely, 2^2123211300 is an apocalyptic number.

2123211300 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 2123211300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3521649600).

2123211300 is an abundant number, since it is smaller than the sum of its proper divisors (4920087900).

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

2123211300 is a wasteful number, since it uses less digits than its factorization.

2123211300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3270 (or 3263 counting only the distinct ones).

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

The square root of 2123211300 is about 46078.3170265582. The cubic root of 2123211300 is about 1285.2799684707.

Adding to 2123211300 its reverse (31123212), we get a palindrome (2154334512).

The spelling of 2123211300 in words is "two billion, one hundred twenty-three million, two hundred eleven thousand, three hundred".