12121021101212 has 24 divisors (see below), whose sum is σ = 22135257013632. Its totient is φ = 5796690966000.

The previous prime is 12121021101181. The next prime is 12121021101227. The reversal of 12121021101212 is 21210112012121.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1941914 + ... + 5292737.

It is an arithmetic number, because the mean of its divisors is an integer number (922302375568).

Almost surely, 2^{12121021101212} is an apocalyptic number.

It is an amenable number.

12121021101212 is a deficient number, since it is larger than the sum of its proper divisors (10014235912420).

12121021101212 is a wasteful number, since it uses less digits than its factorization.

12121021101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7252889 (or 7252887 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12121021101212 its reverse (21210112012121), we get a palindrome (33331133113333).

The spelling of 12121021101212 in words is "twelve trillion, one hundred twenty-one billion, twenty-one million, one hundred one thousand, two hundred twelve".