2121212204 has 6 divisors (see below), whose sum is σ = 3712121364. Its totient is φ = 1060606100.

The previous prime is 2121212189. The next prime is 2121212207. The reversal of 2121212204 is 4022121212.

It is not an unprimeable number, because it can be changed into a prime (2121212207) by changing a digit.

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 as a sum of consecutive naturals, namely, 265151522 + ... + 265151529.

It is an arithmetic number, because the mean of its divisors is an integer number (618686894).

Almost surely, 2^2121212204 is an apocalyptic number.

It is an amenable number.

2121212204 is a deficient number, since it is larger than the sum of its proper divisors (1590909160).

2121212204 is a wasteful number, since it uses less digits than its factorization.

2121212204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530303055 (or 530303053 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2121212204 is about 46056.6195459458. The cubic root of 2121212204 is about 1284.8764594298.

Adding to 2121212204 its reverse (4022121212), we get a palindrome (6143333416).

The spelling of 2121212204 in words is "two billion, one hundred twenty-one million, two hundred twelve thousand, two hundred four".