121020221200 has 60 divisors (see below), whose sum is σ = 296237002788. Its totient is φ = 47494720000.

The previous prime is 121020221173. The next prime is 121020221279. The reversal of 121020221200 is 2122020121.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 14368337424 + 106651883776 = 119868^2 + 326576^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2833051 + ... + 2875450.

Almost surely, 2^121020221200 is an apocalyptic number.

121020221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121020221200 is an abundant number, since it is smaller than the sum of its proper divisors (175216781588).

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

121020221200 is a wasteful number, since it uses less digits than its factorization.

121020221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5708572 (or 5708561 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 121020221200 its reverse (2122020121), we get a palindrome (123142241321).

The spelling of 121020221200 in words is "one hundred twenty-one billion, twenty million, two hundred twenty-one thousand, two hundred".