121110122201221 has 4 divisors (see below), whose sum is σ = 127484339159200. Its totient is φ = 114735905243244.

The previous prime is 121110122201191. The next prime is 121110122201227. The reversal of 121110122201221 is 122102221011121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121110122201221 - 2⁹ = 121110122200709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 6374216957959 = 121110122201221 / (1 + 2 + 1 + 1 + 1 + 0 + 1 + 2 + 2 + 2 + 0 + 1 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121110122201227) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3187108478961 + ... + 3187108478998.

It is an arithmetic number, because the mean of its divisors is an integer number (31871084789800).

Almost surely, 2^{121110122201221} is an apocalyptic number.

It is an amenable number.

121110122201221 is a deficient number, since it is larger than the sum of its proper divisors (6374216957979).

121110122201221 is an equidigital number, since it uses as much as digits as its factorization.

121110122201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6374216957978.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121110122201221 its reverse (122102221011121), we get a palindrome (243212343212342).

The spelling of 121110122201221 in words is "one hundred twenty-one trillion, one hundred ten billion, one hundred twenty-two million, two hundred one thousand, two hundred twenty-one".