121982838 has 16 divisors (see below), whose sum is σ = 244214256. Its totient is φ = 40619520.

The previous prime is 121982827. The next prime is 121982849. The reversal of 121982838 is 838289121.

It is an interprime number because it is at equal distance from previous prime (121982827) and next prime (121982849).

It is a self number, because there is not a number n which added to its sum of digits gives 121982838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3643 + ... + 16038.

It is an arithmetic number, because the mean of its divisors is an integer number (15263391).

Almost surely, 2^121982838 is an apocalyptic number.

121982838 is an abundant number, since it is smaller than the sum of its proper divisors (122231418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121982838 is a wasteful number, since it uses less digits than its factorization.

121982838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20719.

The product of its digits is 55296, while the sum is 42.

The square root of 121982838 is about 11044.5841026270. The cubic root of 121982838 is about 495.9443090221.

The spelling of 121982838 in words is "one hundred twenty-one million, nine hundred eighty-two thousand, eight hundred thirty-eight".