20121230200 has 48 divisors (see below), whose sum is σ = 47574801000. Its totient is φ = 7912072320.

The previous prime is 20121230191. The next prime is 20121230203. The reversal of 20121230200 is 203212102.

It is a super-2 number, since 2×20121230200² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121230203) 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, 840795 + ... + 864394.

Almost surely, 2^20121230200 is an apocalyptic number.

20121230200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121230200 is an abundant number, since it is smaller than the sum of its proper divisors (27453570800).

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

20121230200 is a wasteful number, since it uses less digits than its factorization.

20121230200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705264 (or 1705255 counting only the distinct ones).

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

Adding to 20121230200 its reverse (203212102), we get a palindrome (20324442302).

The spelling of 20121230200 in words is "twenty billion, one hundred twenty-one million, two hundred thirty thousand, two hundred".