121221211100012 has 12 divisors (see below), whose sum is σ = 213236275485576. Its totient is φ = 60296560961280.

The previous prime is 121221211099969. The next prime is 121221211100057. The reversal of 121221211100012 is 210001112122121.

It is an unprimeable number.

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, 78511146314 + ... + 78511147857.

It is an arithmetic number, because the mean of its divisors is an integer number (17769689623798).

Almost surely, 2^{121221211100012} is an apocalyptic number.

It is an amenable number.

121221211100012 is a deficient number, since it is larger than the sum of its proper divisors (92015064385564).

121221211100012 is a wasteful number, since it uses less digits than its factorization.

121221211100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157022294368 (or 157022294366 counting only the distinct ones).

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

Adding to 121221211100012 its reverse (210001112122121), we get a palindrome (331222323222133).

The spelling of 121221211100012 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred eleven million, one hundred thousand, twelve".