12121211020202 has 8 divisors (see below), whose sum is σ = 18181856381700. Its totient is φ = 6060592226304.

The previous prime is 12121211020189. The next prime is 12121211020207. The reversal of 12121211020202 is 20202011212121.

It can be written as a sum of positive squares in 2 ways, for example, as 12088979640241 + 32231379961 = 3476921^2 + 179531^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12121211020207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5459177 + ... + 7351532.

Almost surely, 2^{12121211020202} is an apocalyptic number.

12121211020202 is a deficient number, since it is larger than the sum of its proper divisors (6060645361498).

12121211020202 is a wasteful number, since it uses less digits than its factorization.

12121211020202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13283800.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12121211020202 its reverse (20202011212121), we get a palindrome (32323222232323).

The spelling of 12121211020202 in words is "twelve trillion, one hundred twenty-one billion, two hundred eleven million, twenty thousand, two hundred two".