121220211200 has 120 divisors (see below), whose sum is σ = 327635882640. Its totient is φ = 44080025600.

The previous prime is 121220211199. The next prime is 121220211239. The reversal of 121220211200 is 2112022121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 289670 + ... + 571269.

It is an arithmetic number, because the mean of its divisors is an integer number (2730299022).

Almost surely, 2^121220211200 is an apocalyptic number.

121220211200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220211200 is an abundant number, since it is smaller than the sum of its proper divisors (206415671440).

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

121220211200 is an equidigital number, since it uses as much as digits as its factorization.

121220211200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860978 (or 860957 counting only the distinct ones).

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

Adding to 121220211200 its reverse (2112022121), we get a palindrome (123332233321).

The spelling of 121220211200 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred eleven thousand, two hundred".