121221120212 has 24 divisors (see below), whose sum is σ = 220153218600. Its totient is φ = 58333556736.

The previous prime is 121221120203. The next prime is 121221120233. The reversal of 121221120212 is 212021122121.

It can be written as a sum of positive squares in 4 ways, for example, as 4582477636 + 116638642576 = 67694^2 + 341524^2 .

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, 1633037 + ... + 1705652.

It is an arithmetic number, because the mean of its divisors is an integer number (9173050775).

Almost surely, 2^121221120212 is an apocalyptic number.

It is an amenable number.

121221120212 is a deficient number, since it is larger than the sum of its proper divisors (98932098388).

121221120212 is a wasteful number, since it uses less digits than its factorization.

121221120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3339035 (or 3339033 counting only the distinct ones).

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

Adding to 121221120212 its reverse (212021122121), we get a palindrome (333242242333).

The spelling of 121221120212 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, two hundred twelve".