121021323331321 has 8 divisors (see below), whose sum is σ = 141132738579200. Its totient is φ = 103732562855124.

The previous prime is 121021323331297. The next prime is 121021323331367. The reversal of 121021323331321 is 123133323120121.

It is not a de Polignac number, because 121021323331321 - 2²⁷ = 121021189113593 is a prime.

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 121021323331321.

It is not an unprimeable number, because it can be changed into a prime (121021323334321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176415922881 + ... + 176415923566.

It is an arithmetic number, because the mean of its divisors is an integer number (17641592322400).

Almost surely, 2^{121021323331321} is an apocalyptic number.

It is an amenable number.

121021323331321 is a deficient number, since it is larger than the sum of its proper divisors (20111415247879).

121021323331321 is an frugal number, since it uses more digits than its factorization.

121021323331321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352831846468 (or 352831846454 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 121021323331321 its reverse (123133323120121), we get a palindrome (244154646451442).

The spelling of 121021323331321 in words is "one hundred twenty-one trillion, twenty-one billion, three hundred twenty-three million, three hundred thirty-one thousand, three hundred twenty-one".