121378824 has 80 divisors (see below), whose sum is σ = 388555200. Its totient is φ = 34678368.

The previous prime is 121378801. The next prime is 121378841. The reversal of 121378824 is 428873121.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8844 + ... + 17915.

It is an arithmetic number, because the mean of its divisors is an integer number (4856940).

Almost surely, 2^121378824 is an apocalyptic number.

121378824 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

121378824 is an abundant number, since it is smaller than the sum of its proper divisors (267176376).

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

121378824 is a wasteful number, since it uses less digits than its factorization.

121378824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26784 (or 26771 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 121378824 is about 11017.2058163583. The cubic root of 121378824 is about 495.1243764594.

The spelling of 121378824 in words is "one hundred twenty-one million, three hundred seventy-eight thousand, eight hundred twenty-four".