121122221200 has 60 divisors (see below), whose sum is σ = 291029778160. Its totient is φ = 48443287680.

The previous prime is 121122221189. The next prime is 121122221201. The reversal of 121122221200 is 2122221121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (121122221201) 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 11 ways as a sum of consecutive naturals, for example, 6237907 + ... + 6257293.

Almost surely, 2^121122221200 is an apocalyptic number.

121122221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121122221200 is an abundant number, since it is smaller than the sum of its proper divisors (169907556960).

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

121122221200 is a wasteful number, since it uses less digits than its factorization.

121122221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35024 (or 35013 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121122221200 its reverse (2122221121), we get a palindrome (123244442321).

The spelling of 121122221200 in words is "one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred".