2123212300 has 144 divisors (see below), whose sum is σ = 5158857312. Its totient is φ = 752025600.

The previous prime is 2123212283. The next prime is 2123212309. The reversal of 2123212300 is 32123212.

It is not an unprimeable number, because it can be changed into a prime (2123212309) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11001004 + ... + 11001196.

It is an arithmetic number, because the mean of its divisors is an integer number (35825398).

Almost surely, 2^2123212300 is an apocalyptic number.

2123212300 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 2123212300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2579428656).

2123212300 is an abundant number, since it is smaller than the sum of its proper divisors (3035645012).

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

2123212300 is a wasteful number, since it uses less digits than its factorization.

2123212300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2123212300 is about 46078.3278776476. The cubic root of 2123212300 is about 1285.2801702531.

Adding to 2123212300 its reverse (32123212), we get a palindrome (2155335512).

It can be divided in two parts, 2123 and 212300, that multiplied together give a square (450712900 = 21230²).

The spelling of 2123212300 in words is "two billion, one hundred twenty-three million, two hundred twelve thousand, three hundred".