121220121200 has 30 divisors (see below), whose sum is σ = 291231342144. Its totient is φ = 48488048320.

The previous prime is 121220121193. The next prime is 121220121251. The reversal of 121220121200 is 2121022121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 151524752 + ... + 151525551.

Almost surely, 2^121220121200 is an apocalyptic number.

121220121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220121200 is an abundant number, since it is smaller than the sum of its proper divisors (170011220944).

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

121220121200 is a wasteful number, since it uses less digits than its factorization.

121220121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303050321 (or 303050310 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121220121200 its reverse (2121022121), we get a palindrome (123341143321).

The spelling of 121220121200 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred twenty-one thousand, two hundred".