121216673 has 2 divisors, whose sum is σ = 121216674. Its totient is φ = 121216672.

The previous prime is 121216663. The next prime is 121216687. The reversal of 121216673 is 376612121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80856064 + 40360609 = 8992^2 + 6353^2 .

It is an emirp because it is prime and its reverse (376612121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121216673 - 2¹⁶ = 121151137 is a prime.

It is not a weakly prime, because it can be changed into another prime (121216633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60608336 + 60608337.

It is an arithmetic number, because the mean of its divisors is an integer number (60608337).

Almost surely, 2^121216673 is an apocalyptic number.

It is an amenable number.

121216673 is a deficient number, since it is larger than the sum of its proper divisors (1).

121216673 is an equidigital number, since it uses as much as digits as its factorization.

121216673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 29.

The square root of 121216673 is about 11009.8443676557. The cubic root of 121216673 is about 494.9037979219.

Adding to 121216673 its reverse (376612121), we get a palindrome (497828794).

The spelling of 121216673 in words is "one hundred twenty-one million, two hundred sixteen thousand, six hundred seventy-three".