121102120111221 has 64 divisors (see below), whose sum is σ = 190912468320000. Its totient is φ = 75749135696640.

The previous prime is 121102120111169. The next prime is 121102120111241. The reversal of 121102120111221 is 122111021201121.

It is a happy number.

121102120111221 is a `hidden beast` number, since 1 + 211 + 0 + 2 + 120 + 111 + 221 = 666.

It is not a de Polignac number, because 121102120111221 - 2¹⁸ = 121102119849077 is a prime.

It is a super-2 number, since 2×121102120111221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121102120111194 and 121102120111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121102120111241) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 11309646 + ... + 19238303.

It is an arithmetic number, because the mean of its divisors is an integer number (2983007317500).

Almost surely, 2^{121102120111221} is an apocalyptic number.

It is an amenable number.

121102120111221 is a deficient number, since it is larger than the sum of its proper divisors (69810348208779).

121102120111221 is a wasteful number, since it uses less digits than its factorization.

121102120111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30548131 (or 30548125 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121102120111221 its reverse (122111021201121), we get a palindrome (243213141312342).

The spelling of 121102120111221 in words is "one hundred twenty-one trillion, one hundred two billion, one hundred twenty million, one hundred eleven thousand, two hundred twenty-one".