23121032200 has 144 divisors (see below), whose sum is σ = 62646051780. Its totient is φ = 7912880640.

The previous prime is 23121032183. The next prime is 23121032203. The reversal of 23121032200 is 223012132.

It can be written as a sum of positive squares in 6 ways, for example, as 339959844 + 22781072356 = 18438^2 + 150934^2 .

It is not an unprimeable number, because it can be changed into a prime (23121032203) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6397594 + ... + 6401206.

Almost surely, 2^23121032200 is an apocalyptic number.

23121032200 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 23121032200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31323025890).

23121032200 is an abundant number, since it is smaller than the sum of its proper divisors (39525019580).

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

23121032200 is a wasteful number, since it uses less digits than its factorization.

23121032200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4296 (or 4280 counting only the distinct ones).

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

Adding to 23121032200 its reverse (223012132), we get a palindrome (23344044332).

The spelling of 23121032200 in words is "twenty-three billion, one hundred twenty-one million, thirty-two thousand, two hundred".