121000121200 has 60 divisors (see below), whose sum is σ = 332231769040. Its totient is φ = 41485754880.

The previous prime is 121000121197. The next prime is 121000121219. The reversal of 121000121200 is 2121000121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

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, 21604365 + ... + 21609964.

Almost surely, 2^121000121200 is an apocalyptic number.

121000121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000121200 is an abundant number, since it is smaller than the sum of its proper divisors (211231647840).

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

121000121200 is a wasteful number, since it uses less digits than its factorization.

121000121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43214354 (or 43214343 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121000121200 its reverse (2121000121), we get a palindrome (123121121321).

The spelling of 121000121200 in words is "one hundred twenty-one billion, one hundred twenty-one thousand, two hundred".