121221212200212 has 24 divisors (see below), whose sum is σ = 282910467347200. Its totient is φ = 40398360417216.

The previous prime is 121221212200163. The next prime is 121221212200217. The reversal of 121221212200212 is 212002212122121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221212200217) 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 7 ways as a sum of consecutive naturals, for example, 1088731537 + ... + 1088842872.

Almost surely, 2^{121221212200212} is an apocalyptic number.

121221212200212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121221212200212 is an abundant number, since it is smaller than the sum of its proper divisors (161689255146988).

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

121221212200212 is a wasteful number, since it uses less digits than its factorization.

121221212200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2177579055 (or 2177579053 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 121221212200212 its reverse (212002212122121), we get a palindrome (333223424322333).

The spelling of 121221212200212 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred twelve million, two hundred thousand, two hundred twelve".