121434566689 has 4 divisors (see below), whose sum is σ = 121468180756. Its totient is φ = 121400952624.

The previous prime is 121434566657. The next prime is 121434566707. The reversal of 121434566689 is 986665434121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53296339600 + 68138227089 = 230860^2 + 261033^2 .

It is a cyclic number.

It is not a de Polignac number, because 121434566689 - 2⁵ = 121434566657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121434566609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16801614 + ... + 16808839.

It is an arithmetic number, because the mean of its divisors is an integer number (30367045189).

Almost surely, 2^121434566689 is an apocalyptic number.

It is an amenable number.

121434566689 is a deficient number, since it is larger than the sum of its proper divisors (33614067).

121434566689 is an equidigital number, since it uses as much as digits as its factorization.

121434566689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33614066.

The product of its digits is 7464960, while the sum is 55.

The spelling of 121434566689 in words is "one hundred twenty-one billion, four hundred thirty-four million, five hundred sixty-six thousand, six hundred eighty-nine".