121228149 has 32 divisors (see below), whose sum is σ = 192625920. Its totient is φ = 66350592.

The previous prime is 121228141. The next prime is 121228157. The reversal of 121228149 is 941822121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121228141) and next prime (121228157).

It is not a de Polignac number, because 121228149 - 2³ = 121228141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121228141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82707 + ... + 84159.

It is an arithmetic number, because the mean of its divisors is an integer number (6019560).

Almost surely, 2^121228149 is an apocalyptic number.

It is an amenable number.

121228149 is a deficient number, since it is larger than the sum of its proper divisors (71397771).

121228149 is a wasteful number, since it uses less digits than its factorization.

121228149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629.

The product of its digits is 2304, while the sum is 30.

The square root of 121228149 is about 11010.3655252675. The cubic root of 121228149 is about 494.9194155115.

The spelling of 121228149 in words is "one hundred twenty-one million, two hundred twenty-eight thousand, one hundred forty-nine".