121277289 has 16 divisors (see below), whose sum is σ = 185222528. Its totient is φ = 69144192.

The previous prime is 121277287. The next prime is 121277297. The reversal of 121277289 is 982772121.

It is not a de Polignac number, because 121277289 - 2¹ = 121277287 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 3279 + ... + 15915.

It is an arithmetic number, because the mean of its divisors is an integer number (11576408).

Almost surely, 2^121277289 is an apocalyptic number.

It is an amenable number.

121277289 is a deficient number, since it is larger than the sum of its proper divisors (63945239).

121277289 is a wasteful number, since it uses less digits than its factorization.

121277289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13104.

The product of its digits is 28224, while the sum is 39.

The square root of 121277289 is about 11012.5968327184. The cubic root of 121277289 is about 494.9862785708.

The spelling of 121277289 in words is "one hundred twenty-one million, two hundred seventy-seven thousand, two hundred eighty-nine".