121298689 has 4 divisors (see below), whose sum is σ = 128433924. Its totient is φ = 114163456.

The previous prime is 121298687. The next prime is 121298701. The reversal of 121298689 is 986892121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 986892121 = 2003 ⋅492707.

It can be written as a sum of positive squares in 2 ways, for example, as 86583025 + 34715664 = 9305^2 + 5892^2 .

It is a cyclic number.

It is not a de Polignac number, because 121298689 - 2¹ = 121298687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121298687) 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, 3567592 + ... + 3567625.

It is an arithmetic number, because the mean of its divisors is an integer number (32108481).

Almost surely, 2^121298689 is an apocalyptic number.

It is an amenable number.

121298689 is a deficient number, since it is larger than the sum of its proper divisors (7135235).

121298689 is an equidigital number, since it uses as much as digits as its factorization.

121298689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7135234.

The product of its digits is 124416, while the sum is 46.

The square root of 121298689 is about 11013.5684044727. The cubic root of 121298689 is about 495.0153911481.

The spelling of 121298689 in words is "one hundred twenty-one million, two hundred ninety-eight thousand, six hundred eighty-nine".