2121201221122 has 16 divisors (see below), whose sum is σ = 3217502889720. Its totient is φ = 1048719979008.

The previous prime is 2121201221119. The next prime is 2121201221137. The reversal of 2121201221122 is 2211221021212.

It can be written as a sum of positive squares in 4 ways, for example, as 702527272561 + 1418673948561 = 838169^2 + 1191081^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2121201221122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4714533 + ... + 5144824.

Almost surely, 2^{2121201221122} is an apocalyptic number.

2121201221122 is a deficient number, since it is larger than the sum of its proper divisors (1096301668598).

2121201221122 is a wasteful number, since it uses less digits than its factorization.

2121201221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9860565.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2121201221122 its reverse (2211221021212), we get a palindrome (4332422242334).

The spelling of 2121201221122 in words is "two trillion, one hundred twenty-one billion, two hundred one million, two hundred twenty-one thousand, one hundred twenty-two".