121288199 has 2 divisors, whose sum is σ = 121288200. Its totient is φ = 121288198.

The previous prime is 121288171. The next prime is 121288207. The reversal of 121288199 is 991882121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121288199 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 (121288169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60644099 + 60644100.

It is an arithmetic number, because the mean of its divisors is an integer number (60644100).

Almost surely, 2^121288199 is an apocalyptic number.

121288199 is a deficient number, since it is larger than the sum of its proper divisors (1).

121288199 is an equidigital number, since it uses as much as digits as its factorization.

121288199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 41.

The square root of 121288199 is about 11013.0921634208. The cubic root of 121288199 is about 495.0011209715.

The spelling of 121288199 in words is "one hundred twenty-one million, two hundred eighty-eight thousand, one hundred ninety-nine".