121221020211222 has 16 divisors (see below), whose sum is σ = 244707853885632. Its totient is φ = 40029371159880.

The previous prime is 121221020211209. The next prime is 121221020211293. The reversal of 121221020211222 is 222112020122121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94408893604 + ... + 94408894887.

It is an arithmetic number, because the mean of its divisors is an integer number (15294240867852).

Almost surely, 2^{121221020211222} is an apocalyptic number.

121221020211222 is an abundant number, since it is smaller than the sum of its proper divisors (123486833674410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121221020211222 is a wasteful number, since it uses less digits than its factorization.

121221020211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188817788603.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 121221020211222 its reverse (222112020122121), we get a palindrome (343333040333343).

The spelling of 121221020211222 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty million, two hundred eleven thousand, two hundred twenty-two".