121633217 has 8 divisors (see below), whose sum is σ = 122573736. Its totient is φ = 120696832.

The previous prime is 121633159. The next prime is 121633229. The reversal of 121633217 is 712336121.

It can be written as a sum of positive squares in 4 ways, for example, as 45751696 + 75881521 = 6764^2 + 8711^2 .

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 121633217 - 2⁸ = 121632961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121633277) 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, 80723 + ... + 82215.

It is an arithmetic number, because the mean of its divisors is an integer number (15321717).

Almost surely, 2^121633217 is an apocalyptic number.

It is an amenable number.

121633217 is a deficient number, since it is larger than the sum of its proper divisors (940519).

121633217 is a wasteful number, since it uses less digits than its factorization.

121633217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067.

The product of its digits is 1512, while the sum is 26.

The square root of 121633217 is about 11028.7450328675. The cubic root of 121633217 is about 495.4700388470.

Adding to 121633217 its reverse (712336121), we get a palindrome (833969338).

The spelling of 121633217 in words is "one hundred twenty-one million, six hundred thirty-three thousand, two hundred seventeen".