121221122120012 has 96 divisors (see below), whose sum is σ = 226689982041600. Its totient is φ = 56556556992000.

The previous prime is 121221122119931. The next prime is 121221122120023. The reversal of 121221122120012 is 210021221122121.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1793469914 + ... + 1793537502.

It is an arithmetic number, because the mean of its divisors is an integer number (2361353979600).

Almost surely, 2^{121221122120012} is an apocalyptic number.

It is an amenable number.

121221122120012 is a deficient number, since it is larger than the sum of its proper divisors (105468859921588).

121221122120012 is a wasteful number, since it uses less digits than its factorization.

121221122120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69087 (or 69085 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121221122120012 its reverse (210021221122121), we get a palindrome (331242343242133).

The spelling of 121221122120012 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred twenty thousand, twelve".