121212221212200 has 192 divisors, whose sum is σ = 388816633339200. Its totient is φ = 31216818124800.

The previous prime is 121212221212193. The next prime is 121212221212267. The reversal of 121212221212200 is 2212122212121.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24097891 + ... + 28690290.

It is an arithmetic number, because the mean of its divisors is an integer number (2025086631975).

Almost surely, 2^{121212221212200} is an apocalyptic number.

121212221212200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212221212200 is an abundant number, since it is smaller than the sum of its proper divisors (267604412127000).

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

121212221212200 is a wasteful number, since it uses less digits than its factorization.

121212221212200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52788332 (or 52788323 counting only the distinct ones).

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

Adding to 121212221212200 its reverse (2212122212121), we get a palindrome (123424343424321).

The spelling of 121212221212200 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred twenty-one million, two hundred twelve thousand, two hundred".