121298687 has 2 divisors, whose sum is σ = 121298688. Its totient is φ = 121298686.

The previous prime is 121298647. The next prime is 121298701. The reversal of 121298687 is 786892121.

It is a strong prime.

It is an emirp because it is prime and its reverse (786892121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121298687 - 2¹⁰ = 121297663 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121298647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60649343 + 60649344.

It is an arithmetic number, because the mean of its divisors is an integer number (60649344).

Almost surely, 2^121298687 is an apocalyptic number.

121298687 is a deficient number, since it is larger than the sum of its proper divisors (1).

121298687 is an equidigital number, since it uses as much as digits as its factorization.

121298687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 44.

The square root of 121298687 is about 11013.5683136756. The cubic root of 121298687 is about 495.0153884275.

It can be divided in two parts, 1212 and 98687, that added together give a palindrome (99899).

The spelling of 121298687 in words is "one hundred twenty-one million, two hundred ninety-eight thousand, six hundred eighty-seven".