121398824 has 16 divisors (see below), whose sum is σ = 228136500. Its totient is φ = 60562432.

The previous prime is 121398817. The next prime is 121398839. The reversal of 121398824 is 428893121.

It can be written as a sum of positive squares in 2 ways, for example, as 121396324 + 2500 = 11018^2 + 50^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13307 + ... + 20490.

Almost surely, 2^121398824 is an apocalyptic number.

It is an amenable number.

121398824 is a deficient number, since it is larger than the sum of its proper divisors (106737676).

121398824 is a wasteful number, since it uses less digits than its factorization.

121398824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34252 (or 34248 counting only the distinct ones).

The product of its digits is 27648, while the sum is 38.

The square root of 121398824 is about 11018.1134501329. The cubic root of 121398824 is about 495.1515694061.

The spelling of 121398824 in words is "one hundred twenty-one million, three hundred ninety-eight thousand, eight hundred twenty-four".