121277288 has 16 divisors (see below), whose sum is σ = 248067360. Its totient is φ = 55126000.

The previous prime is 121277287. The next prime is 121277297. The reversal of 121277288 is 882772121.

It is not an unprimeable number, because it can be changed into a prime (121277287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688988 + ... + 689163.

It is an arithmetic number, because the mean of its divisors is an integer number (15504210).

Almost surely, 2^121277288 is an apocalyptic number.

It is an amenable number.

121277288 is an abundant number, since it is smaller than the sum of its proper divisors (126790072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121277288 is a wasteful number, since it uses less digits than its factorization.

121277288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378168 (or 1378164 counting only the distinct ones).

The product of its digits is 25088, while the sum is 38.

The square root of 121277288 is about 11012.5967873159. The cubic root of 121277288 is about 494.9862772103.

The spelling of 121277288 in words is "one hundred twenty-one million, two hundred seventy-seven thousand, two hundred eighty-eight".