121222001200 has 120 divisors (see below), whose sum is σ = 295967888192. Its totient is φ = 47702856960.

The previous prime is 121222001191. The next prime is 121222001209. The reversal of 121222001200 is 2100222121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121222001191) and next prime (121222001209).

It is not an unprimeable number, because it can be changed into a prime (121222001209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24305107 + ... + 24310093.

Almost surely, 2^121222001200 is an apocalyptic number.

121222001200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121222001200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147983944096).

121222001200 is an abundant number, since it is smaller than the sum of its proper divisors (174745886992).

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

121222001200 is a wasteful number, since it uses less digits than its factorization.

121222001200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5979 (or 5968 counting only the distinct ones).

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

Adding to 121222001200 its reverse (2100222121), we get a palindrome (123322223321).

The spelling of 121222001200 in words is "one hundred twenty-one billion, two hundred twenty-two million, one thousand, two hundred".