12121320202 has 4 divisors (see below), whose sum is σ = 18181980306. Its totient is φ = 6060660100.

The previous prime is 12121320193. The next prime is 12121320223. The reversal of 12121320202 is 20202312121.

It is a happy number.

12121320202 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11791570921 + 329749281 = 108589^2 + 18159^2 .

It is an unprimeable number.

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, 3030330049 + ... + 3030330052.

Almost surely, 2^12121320202 is an apocalyptic number.

12121320202 is a deficient number, since it is larger than the sum of its proper divisors (6060660104).

12121320202 is an equidigital number, since it uses as much as digits as its factorization.

12121320202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6060660103.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12121320202 its reverse (20202312121), we get a palindrome (32323632323).

The spelling of 12121320202 in words is "twelve billion, one hundred twenty-one million, three hundred twenty thousand, two hundred two".