121903697209 has 8 divisors (see below), whose sum is σ = 140173227200. Its totient is φ = 103847846256.

The previous prime is 121903697177. The next prime is 121903697221. The reversal of 121903697209 is 902796309121.

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

It is not a de Polignac number, because 121903697209 - 2⁵ = 121903697177 is a prime.

It is a super-2 number, since 2×121903697209² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121903797209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53418534 + ... + 53420815.

It is an arithmetic number, because the mean of its divisors is an integer number (17521653400).

Almost surely, 2^121903697209 is an apocalyptic number.

It is an amenable number.

121903697209 is a deficient number, since it is larger than the sum of its proper divisors (18269529991).

121903697209 is a wasteful number, since it uses less digits than its factorization.

121903697209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106839519.

The product of its (nonzero) digits is 367416, while the sum is 49.

The spelling of 121903697209 in words is "one hundred twenty-one billion, nine hundred three million, six hundred ninety-seven thousand, two hundred nine".