121662817 has 8 divisors (see below), whose sum is σ = 125729280. Its totient is φ = 117605280.

The previous prime is 121662803. The next prime is 121662851. The reversal of 121662817 is 718266121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121662817 - 2¹⁹ = 121138529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121662887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36309 + ... + 39517.

It is an arithmetic number, because the mean of its divisors is an integer number (15716160).

Almost surely, 2^121662817 is an apocalyptic number.

It is an amenable number.

121662817 is a deficient number, since it is larger than the sum of its proper divisors (4066463).

121662817 is a wasteful number, since it uses less digits than its factorization.

121662817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4463.

The product of its digits is 8064, while the sum is 34.

The square root of 121662817 is about 11030.0868990231. The cubic root of 121662817 is about 495.5102272209.

The spelling of 121662817 in words is "one hundred twenty-one million, six hundred sixty-two thousand, eight hundred seventeen".