121765228 has 24 divisors (see below), whose sum is σ = 232393280. Its totient is φ = 55486080.

The previous prime is 121765223. The next prime is 121765247. The reversal of 121765228 is 822567121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121765193 and 121765202.

It is not an unprimeable number, because it can be changed into a prime (121765223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10713 + ... + 18928.

Almost surely, 2^121765228 is an apocalyptic number.

It is an amenable number.

121765228 is a deficient number, since it is larger than the sum of its proper divisors (110628052).

121765228 is a wasteful number, since it uses less digits than its factorization.

121765228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29737 (or 29735 counting only the distinct ones).

The product of its digits is 13440, while the sum is 34.

The square root of 121765228 is about 11034.7282703291. The cubic root of 121765228 is about 495.6492219366.

The spelling of 121765228 in words is "one hundred twenty-one million, seven hundred sixty-five thousand, two hundred twenty-eight".