121280228 has 24 divisors (see below), whose sum is σ = 218974392. Its totient is φ = 58731264.

The previous prime is 121280221. The next prime is 121280231. The reversal of 121280228 is 822082121.

It can be written as a sum of positive squares in 4 ways, for example, as 56670784 + 64609444 = 7528^2 + 8038^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121280197 and 121280206.

It is not an unprimeable number, because it can be changed into a prime (121280221) 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, 32726 + ... + 36242.

It is an arithmetic number, because the mean of its divisors is an integer number (9123933).

Almost surely, 2^121280228 is an apocalyptic number.

It is an amenable number.

121280228 is a deficient number, since it is larger than the sum of its proper divisors (97694164).

121280228 is a wasteful number, since it uses less digits than its factorization.

121280228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3791 (or 3789 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 121280228 is about 11012.7302700102. The cubic root of 121280228 is about 494.9902769916.

The spelling of 121280228 in words is "one hundred twenty-one million, two hundred eighty thousand, two hundred twenty-eight".