121321211103331 has 2 divisors, whose sum is σ = 121321211103332. Its totient is φ = 121321211103330.

The previous prime is 121321211103329. The next prime is 121321211103361. The reversal of 121321211103331 is 133301112123121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121321211103331 - 2¹ = 121321211103329 is a prime.

It is a super-5 number, since 5×121321211103331⁵ (a number of 72 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

Together with 121321211103329, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 121321211103296 and 121321211103305.

It is not a weakly prime, because it can be changed into another prime (121321211103361) 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 as a sum of consecutive naturals, namely, 60660605551665 + 60660605551666.

It is an arithmetic number, because the mean of its divisors is an integer number (60660605551666).

Almost surely, 2^{121321211103331} is an apocalyptic number.

121321211103331 is a deficient number, since it is larger than the sum of its proper divisors (1).

121321211103331 is an equidigital number, since it uses as much as digits as its factorization.

121321211103331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 121321211103331 its reverse (133301112123121), we get a palindrome (254622323226452).

The spelling of 121321211103331 in words is "one hundred twenty-one trillion, three hundred twenty-one billion, two hundred eleven million, one hundred three thousand, three hundred thirty-one".