121212203204 has 12 divisors (see below), whose sum is σ = 217854365484. Its totient is φ = 58968098784.

The previous prime is 121212203197. The next prime is 121212203267. The reversal of 121212203204 is 402302212121.

121212203204 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 117787612804 + 3424590400 = 343202^2 + 58520^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409500539 + ... + 409500834.

It is an arithmetic number, because the mean of its divisors is an integer number (18154530457).

Almost surely, 2^121212203204 is an apocalyptic number.

It is an amenable number.

121212203204 is a deficient number, since it is larger than the sum of its proper divisors (96642162280).

121212203204 is a wasteful number, since it uses less digits than its factorization.

121212203204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819001414 (or 819001412 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 121212203204 its reverse (402302212121), we get a palindrome (523514415325).

The spelling of 121212203204 in words is "one hundred twenty-one billion, two hundred twelve million, two hundred three thousand, two hundred four".