1221212000200 has 48 divisors (see below), whose sum is σ = 2988755694000. Its totient is φ = 462775072320.

The previous prime is 1221212000191. The next prime is 1221212000227. The reversal of 1221212000200 is 20002121221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160681990 + ... + 160689589.

It is an arithmetic number, because the mean of its divisors is an integer number (62265743625).

Almost surely, 2^{1221212000200} is an apocalyptic number.

1221212000200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221212000200 is an abundant number, since it is smaller than the sum of its proper divisors (1767543693800).

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

1221212000200 is a wasteful number, since it uses less digits than its factorization.

1221212000200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321371614 (or 321371605 counting only the distinct ones).

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

Adding to 1221212000200 its reverse (20002121221), we get a palindrome (1241214121421).

The spelling of 1221212000200 in words is "one trillion, two hundred twenty-one billion, two hundred twelve million, two hundred", and thus it is an aban number.