121617267009 has 24 divisors (see below), whose sum is σ = 188644349088. Its totient is φ = 69490612800.

The previous prime is 121617266989. The next prime is 121617267017. The reversal of 121617267009 is 900762716121.

It is a happy number.

It is not a de Polignac number, because 121617267009 - 2¹² = 121617262913 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121617267809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3318234 + ... + 3354684.

It is an arithmetic number, because the mean of its divisors is an integer number (7860181212).

Almost surely, 2^121617267009 is an apocalyptic number.

It is an amenable number.

121617267009 is a deficient number, since it is larger than the sum of its proper divisors (67027082079).

121617267009 is a wasteful number, since it uses less digits than its factorization.

121617267009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59165 (or 59158 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 42.

The spelling of 121617267009 in words is "one hundred twenty-one billion, six hundred seventeen million, two hundred sixty-seven thousand, nine".