121287868 has 24 divisors (see below), whose sum is σ = 240613520. Its totient is φ = 53032320.

The previous prime is 121287863. The next prime is 121287923. The reversal of 121287868 is 868782121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121287863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60393 + ... + 62368.

Almost surely, 2^121287868 is an apocalyptic number.

It is an amenable number.

121287868 is a deficient number, since it is larger than the sum of its proper divisors (119325652).

121287868 is a wasteful number, since it uses less digits than its factorization.

121287868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122797 (or 122795 counting only the distinct ones).

The product of its digits is 86016, while the sum is 43.

The square root of 121287868 is about 11013.0771358417. The cubic root of 121287868 is about 495.0006706790. Note that the first 3 decimals are identical.

The spelling of 121287868 in words is "one hundred twenty-one million, two hundred eighty-seven thousand, eight hundred sixty-eight".