121396887 has 20 divisors (see below), whose sum is σ = 182789376. Its totient is φ = 80287200.

The previous prime is 121396867. The next prime is 121396931. The reversal of 121396887 is 788693121.

It is not a de Polignac number, because 121396887 - 2⁸ = 121396631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121396867) 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 19 ways as a sum of consecutive naturals, for example, 4387 + ... + 16187.

Almost surely, 2^121396887 is an apocalyptic number.

121396887 is a deficient number, since it is larger than the sum of its proper divisors (61392489).

121396887 is a wasteful number, since it uses less digits than its factorization.

121396887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11940 (or 11931 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 121396887 is about 11018.0255490718. The cubic root of 121396887 is about 495.1489358998.

The spelling of 121396887 in words is "one hundred twenty-one million, three hundred ninety-six thousand, eight hundred eighty-seven".