121423344121 has 2 divisors, whose sum is σ = 121423344122. Its totient is φ = 121423344120.

The previous prime is 121423344073. The next prime is 121423344127. The reversal of 121423344121 is 121443324121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96075201600 + 25348142521 = 309960^2 + 159211^2 .

It is a cyclic number.

It is not a de Polignac number, because 121423344121 - 2¹⁵ = 121423311353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121423344121.

It is not a weakly prime, because it can be changed into another prime (121423344127) 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, 60711672060 + 60711672061.

It is an arithmetic number, because the mean of its divisors is an integer number (60711672061).

Almost surely, 2^121423344121 is an apocalyptic number.

It is an amenable number.

121423344121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121423344121 is an equidigital number, since it uses as much as digits as its factorization.

121423344121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 28.

Adding to 121423344121 its reverse (121443324121), we get a palindrome (242866668242).

The spelling of 121423344121 in words is "one hundred twenty-one billion, four hundred twenty-three million, three hundred forty-four thousand, one hundred twenty-one".