12021023200 has 36 divisors (see below), whose sum is σ = 29346324840. Its totient is φ = 4808408960.

The previous prime is 12021023173. The next prime is 12021023207. The reversal of 12021023200 is 232012021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021023207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7512340 + ... + 7513939.

It is an arithmetic number, because the mean of its divisors is an integer number (815175690).

Almost surely, 2^12021023200 is an apocalyptic number.

12021023200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021023200 is an abundant number, since it is smaller than the sum of its proper divisors (17325301640).

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

12021023200 is a wasteful number, since it uses less digits than its factorization.

12021023200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15026299 (or 15026286 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 12021023200 its reverse (232012021), we get a palindrome (12253035221).

The spelling of 12021023200 in words is "twelve billion, twenty-one million, twenty-three thousand, two hundred".