121343310161 has 2 divisors, whose sum is σ = 121343310162. Its totient is φ = 121343310160.

The previous prime is 121343310149. The next prime is 121343310169. The reversal of 121343310161 is 161013343121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95283342400 + 26059967761 = 308680^2 + 161431^2 .

It is an emirp because it is prime and its reverse (161013343121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121343310161 - 2²² = 121339115857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121343310161.

It is not a weakly prime, because it can be changed into another prime (121343310169) 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, 60671655080 + 60671655081.

It is an arithmetic number, because the mean of its divisors is an integer number (60671655081).

Almost surely, 2^121343310161 is an apocalyptic number.

It is an amenable number.

121343310161 is a deficient number, since it is larger than the sum of its proper divisors (1).

121343310161 is an equidigital number, since it uses as much as digits as its factorization.

121343310161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 121343310161 its reverse (161013343121), we get a palindrome (282356653282).

The spelling of 121343310161 in words is "one hundred twenty-one billion, three hundred forty-three million, three hundred ten thousand, one hundred sixty-one".