23121211213200 has 60 divisors (see below), whose sum is σ = 74064946590128. Its totient is φ = 6165656323200.

The previous prime is 23121211213193. The next prime is 23121211213201. The reversal of 23121211213200 is 231211212132.

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (23121211213201) 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 11 ways as a sum of consecutive naturals, for example, 9633836806 + ... + 9633839205.

Almost surely, 2^{23121211213200} is an apocalyptic number.

23121211213200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23121211213200 is an abundant number, since it is smaller than the sum of its proper divisors (50943735376928).

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

23121211213200 is a wasteful number, since it uses less digits than its factorization.

23121211213200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19267676032 (or 19267676021 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 23121211213200 its reverse (231211212132), we get a palindrome (23352422425332).

The spelling of 23121211213200 in words is "twenty-three trillion, one hundred twenty-one billion, two hundred eleven million, two hundred thirteen thousand, two hundred".