121228099 has 2 divisors, whose sum is σ = 121228100. Its totient is φ = 121228098.

The previous prime is 121228097. The next prime is 121228141. The reversal of 121228099 is 990822121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121228099 - 2¹ = 121228097 is a prime.

Together with 121228097, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121228097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60614049 + 60614050.

It is an arithmetic number, because the mean of its divisors is an integer number (60614050).

Almost surely, 2^121228099 is an apocalyptic number.

121228099 is a deficient number, since it is larger than the sum of its proper divisors (1).

121228099 is an equidigital number, since it uses as much as digits as its factorization.

121228099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 121228099 is about 11010.3632546797. The cubic root of 121228099 is about 494.9193474691.

The spelling of 121228099 in words is "one hundred twenty-one million, two hundred twenty-eight thousand, ninety-nine".