12121020202112 has 32 divisors (see below), whose sum is σ = 24151894667100. Its totient is φ = 6059368207360.

The previous prime is 12121020202099. The next prime is 12121020202133. The reversal of 12121020202112 is 21120202012121.

It can be written as a sum of positive squares in 2 ways, for example, as 11779337866816 + 341682335296 = 3432104^2 + 584536^2 .

It is a tau number, because it is divible by the number of its divisors (32).

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 in 3 ways as a sum of consecutive naturals, for example, 8238839 + ... + 9597942.

Almost surely, 2^{12121020202112} is an apocalyptic number.

It is an amenable number.

12121020202112 is a deficient number, since it is larger than the sum of its proper divisors (12030874464988).

12121020202112 is an equidigital number, since it uses as much as digits as its factorization.

12121020202112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17842104 (or 17842092 counting only the distinct ones).

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

Adding to 12121020202112 its reverse (21120202012121), we get a palindrome (33241222214233).

The spelling of 12121020202112 in words is "twelve trillion, one hundred twenty-one billion, twenty million, two hundred two thousand, one hundred twelve".