121311443441 has 2 divisors, whose sum is σ = 121311443442. Its totient is φ = 121311443440.

The previous prime is 121311443417. The next prime is 121311443459. The reversal of 121311443441 is 144344113121.

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., 89913021025 + 31398422416 = 299855^2 + 177196^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121311443441 is a prime.

It is not a weakly prime, because it can be changed into another prime (121311440441) 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, 60655721720 + 60655721721.

It is an arithmetic number, because the mean of its divisors is an integer number (60655721721).

Almost surely, 2^121311443441 is an apocalyptic number.

It is an amenable number.

121311443441 is a deficient number, since it is larger than the sum of its proper divisors (1).

121311443441 is an equidigital number, since it uses as much as digits as its factorization.

121311443441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 29.

Adding to 121311443441 its reverse (144344113121), we get a palindrome (265655556562).

The spelling of 121311443441 in words is "one hundred twenty-one billion, three hundred eleven million, four hundred forty-three thousand, four hundred forty-one".