121340425441321 has 2 divisors, whose sum is σ = 121340425441322. Its totient is φ = 121340425441320.

The previous prime is 121340425441309. The next prime is 121340425441421. The reversal of 121340425441321 is 123144524043121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121331216352025 + 9209089296 = 11015045^2 + 95964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121340425441321 is a prime.

It is a super-2 number, since 2×121340425441321² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121340425441421) 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, 60670212720660 + 60670212720661.

It is an arithmetic number, because the mean of its divisors is an integer number (60670212720661).

Almost surely, 2^{121340425441321} is an apocalyptic number.

It is an amenable number.

121340425441321 is a deficient number, since it is larger than the sum of its proper divisors (1).

121340425441321 is an equidigital number, since it uses as much as digits as its factorization.

121340425441321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92160, while the sum is 37.

Adding to 121340425441321 its reverse (123144524043121), we get a palindrome (244484949484442).

The spelling of 121340425441321 in words is "one hundred twenty-one trillion, three hundred forty billion, four hundred twenty-five million, four hundred forty-one thousand, three hundred twenty-one".