121351099 has 2 divisors, whose sum is σ = 121351100. Its totient is φ = 121351098.

The previous prime is 121351091. The next prime is 121351121. The reversal of 121351099 is 990153121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121351099 - 2³ = 121351091 is a prime.

It is equal to p_6914209 and since 121351099 and 6914209 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121351099.

It is not a weakly prime, because it can be changed into another prime (121351091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60675549 + 60675550.

It is an arithmetic number, because the mean of its divisors is an integer number (60675550).

Almost surely, 2^121351099 is an apocalyptic number.

121351099 is a deficient number, since it is larger than the sum of its proper divisors (1).

121351099 is an equidigital number, since it uses as much as digits as its factorization.

121351099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 121351099 is about 11015.9474853505. The cubic root of 121351099 is about 495.0866752959.

The spelling of 121351099 in words is "one hundred twenty-one million, three hundred fifty-one thousand, ninety-nine".