20121201200 has 60 divisors (see below), whose sum is σ = 49022116848. Its totient is φ = 7935110400.

The previous prime is 20121201197. The next prime is 20121201203. The reversal of 20121201200 is 210212102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20121201197) and next prime (20121201203).

It is not an unprimeable number, because it can be changed into a prime (20121201203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 325847 + ... + 382646.

Almost surely, 2^20121201200 is an apocalyptic number.

20121201200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121201200 is an abundant number, since it is smaller than the sum of its proper divisors (28900915648).

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

20121201200 is a wasteful number, since it uses less digits than its factorization.

20121201200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708582 (or 708571 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20121201200 its reverse (210212102), we get a palindrome (20331413302).

The spelling of 20121201200 in words is "twenty billion, one hundred twenty-one million, two hundred one thousand, two hundred".