121351669 has 2 divisors, whose sum is σ = 121351670. Its totient is φ = 121351668.

The previous prime is 121351667. The next prime is 121351733. The reversal of 121351669 is 966153121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98903025 + 22448644 = 9945^2 + 4738^2 .

It is an emirp because it is prime and its reverse (966153121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121351669 - 2¹ = 121351667 is a prime.

It is a super-2 number, since 2×121351669² = 29452455138171122, which contains 22 as substring.

Together with 121351667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121351667) 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, 60675834 + 60675835.

It is an arithmetic number, because the mean of its divisors is an integer number (60675835).

Almost surely, 2^121351669 is an apocalyptic number.

It is an amenable number.

121351669 is a deficient number, since it is larger than the sum of its proper divisors (1).

121351669 is an equidigital number, since it uses as much as digits as its factorization.

121351669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 34.

The square root of 121351669 is about 11015.9733569031. The cubic root of 121351669 is about 495.0874504543.

The spelling of 121351669 in words is "one hundred twenty-one million, three hundred fifty-one thousand, six hundred sixty-nine".