20121212200 has 48 divisors (see below), whose sum is σ = 47480086080. Its totient is φ = 7928352960.

The previous prime is 20121212183. The next prime is 20121212207. The reversal of 20121212200 is 221212102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20121212207) 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, 737392 + ... + 764191.

It is an arithmetic number, because the mean of its divisors is an integer number (989168460).

Almost surely, 2^20121212200 is an apocalyptic number.

20121212200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121212200 is an abundant number, since it is smaller than the sum of its proper divisors (27358873880).

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

20121212200 is a wasteful number, since it uses less digits than its factorization.

20121212200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501666 (or 1501657 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20121212200 its reverse (221212102), we get a palindrome (20342424302).

The spelling of 20121212200 in words is "twenty billion, one hundred twenty-one million, two hundred twelve thousand, two hundred".