121670405449 has 2 divisors, whose sum is σ = 121670405450. Its totient is φ = 121670405448.

The previous prime is 121670405443. The next prime is 121670405489. The reversal of 121670405449 is 944504076121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97942083849 + 23728321600 = 312957^2 + 154040^2 .

It is a cyclic number.

It is not a de Polignac number, because 121670405449 - 2¹⁷ = 121670274377 is a prime.

It is not a weakly prime, because it can be changed into another prime (121670405443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60835202724 + 60835202725.

It is an arithmetic number, because the mean of its divisors is an integer number (60835202725).

Almost surely, 2^121670405449 is an apocalyptic number.

It is an amenable number.

121670405449 is a deficient number, since it is larger than the sum of its proper divisors (1).

121670405449 is an equidigital number, since it uses as much as digits as its factorization.

121670405449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 121670405449 in words is "one hundred twenty-one billion, six hundred seventy million, four hundred five thousand, four hundred forty-nine".