121221021212012 has 48 divisors (see below), whose sum is σ = 215101291293504. Its totient is φ = 59768604000000.

The previous prime is 121221021211949. The next prime is 121221021212023. The reversal of 121221021212012 is 210212120122121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191565137 + ... + 192196887.

It is an arithmetic number, because the mean of its divisors is an integer number (4481276901948).

Almost surely, 2^{121221021212012} is an apocalyptic number.

It is an amenable number.

121221021212012 is a deficient number, since it is larger than the sum of its proper divisors (93880270081492).

121221021212012 is a wasteful number, since it uses less digits than its factorization.

121221021212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633770 (or 633768 counting only the distinct ones).

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

Adding to 121221021212012 its reverse (210212120122121), we get a palindrome (331433141334133).

The spelling of 121221021212012 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty-one million, two hundred twelve thousand, twelve".