121434872665 has 32 divisors (see below), whose sum is σ = 151021946880. Its totient is φ = 93681814464.

The previous prime is 121434872659. The next prime is 121434872677. The reversal of 121434872665 is 566278434121.

It is a cyclic number.

It is not a de Polignac number, because 121434872665 - 2²³ = 121426484057 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 7384182 + ... + 7400608.

It is an arithmetic number, because the mean of its divisors is an integer number (4719435840).

Almost surely, 2^121434872665 is an apocalyptic number.

It is an amenable number.

121434872665 is a deficient number, since it is larger than the sum of its proper divisors (29587074215).

121434872665 is a wasteful number, since it uses less digits than its factorization.

121434872665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16941.

The product of its digits is 1935360, while the sum is 49.

The spelling of 121434872665 in words is "one hundred twenty-one billion, four hundred thirty-four million, eight hundred seventy-two thousand, six hundred sixty-five".