121002121110221 has 36 divisors (see below), whose sum is σ = 139192970520384. Its totient is φ = 105119318304000.

The previous prime is 121002121110197. The next prime is 121002121110251. The reversal of 121002121110221 is 122011121200121.

It is not a de Polignac number, because 121002121110221 - 2²⁶ = 121002054001357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121002121110221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002121110251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1521406226 + ... + 1521485756.

It is an arithmetic number, because the mean of its divisors is an integer number (3866471403344).

Almost surely, 2^{121002121110221} is an apocalyptic number.

It is an amenable number.

121002121110221 is a deficient number, since it is larger than the sum of its proper divisors (18190849410163).

121002121110221 is a wasteful number, since it uses less digits than its factorization.

121002121110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110742 (or 110712 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121002121110221 its reverse (122011121200121), we get a palindrome (243013242310342).

The spelling of 121002121110221 in words is "one hundred twenty-one trillion, two billion, one hundred twenty-one million, one hundred ten thousand, two hundred twenty-one".