121221120323 has 2 divisors, whose sum is σ = 121221120324. Its totient is φ = 121221120322.

The previous prime is 121221120313. The next prime is 121221120337. The reversal of 121221120323 is 323021122121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121221120323 - 2¹² = 121221116227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121221120295 and 121221120304.

It is not a weakly prime, because it can be changed into another prime (121221120313) 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 as a sum of consecutive naturals, namely, 60610560161 + 60610560162.

It is an arithmetic number, because the mean of its divisors is an integer number (60610560162).

Almost surely, 2^121221120323 is an apocalyptic number.

121221120323 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221120323 is an equidigital number, since it uses as much as digits as its factorization.

121221120323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 121221120323 its reverse (323021122121), we get a palindrome (444242242444).

The spelling of 121221120323 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, three hundred twenty-three".