121297827 has 16 divisors (see below), whose sum is σ = 186294272. Its totient is φ = 68765760.

The previous prime is 121297819. The next prime is 121297871. The reversal of 121297827 is 728792121.

It is not a de Polignac number, because 121297827 - 2³ = 121297819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121297027) 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 15 ways as a sum of consecutive naturals, for example, 20074 + ... + 25407.

It is an arithmetic number, because the mean of its divisors is an integer number (11643392).

Almost surely, 2^121297827 is an apocalyptic number.

121297827 is a deficient number, since it is larger than the sum of its proper divisors (64996445).

121297827 is a wasteful number, since it uses less digits than its factorization.

121297827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45618.

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

The square root of 121297827 is about 11013.5292708559. The cubic root of 121297827 is about 495.0142185488.

The spelling of 121297827 in words is "one hundred twenty-one million, two hundred ninety-seven thousand, eight hundred twenty-seven".