121221120221200 has 30 divisors (see below), whose sum is σ = 291233741332394. Its totient is φ = 48488448088320.

The previous prime is 121221120221197. The next prime is 121221120221269. The reversal of 121221120221200 is 2122021122121.

It can be written as a sum of positive squares in 3 ways, for example, as 312007147776 + 120909113073424 = 558576^2 + 10995868^2 .

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, 151526399877 + ... + 151526400676.

Almost surely, 2^{121221120221200} is an apocalyptic number.

121221120221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121221120221200 is an abundant number, since it is smaller than the sum of its proper divisors (170012621111194).

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

121221120221200 is a wasteful number, since it uses less digits than its factorization.

121221120221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303052800571 (or 303052800560 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121221120221200 its reverse (2122021122121), we get a palindrome (123343141343321).

The spelling of 121221120221200 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, one hundred twenty million, two hundred twenty-one thousand, two hundred".