121443121213 has 2 divisors, whose sum is σ = 121443121214. Its totient is φ = 121443121212.

The previous prime is 121443121211. The next prime is 121443121229. The reversal of 121443121213 is 312121344121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121102608004 + 340513209 = 347998^2 + 18453^2 .

It is a cyclic number.

It is not a de Polignac number, because 121443121213 - 2¹ = 121443121211 is a prime.

Together with 121443121211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121443121211) 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 as a sum of consecutive naturals, namely, 60721560606 + 60721560607.

It is an arithmetic number, because the mean of its divisors is an integer number (60721560607).

Almost surely, 2^121443121213 is an apocalyptic number.

It is an amenable number.

121443121213 is a deficient number, since it is larger than the sum of its proper divisors (1).

121443121213 is an equidigital number, since it uses as much as digits as its factorization.

121443121213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 25.

Adding to 121443121213 its reverse (312121344121), we get a palindrome (433564465334).

The spelling of 121443121213 in words is "one hundred twenty-one billion, four hundred forty-three million, one hundred twenty-one thousand, two hundred thirteen".