121357824 has 80 divisors (see below), whose sum is σ = 369523968. Its totient is φ = 34670592.

The previous prime is 121357813. The next prime is 121357829. The reversal of 121357824 is 428753121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121357829) 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, 5109 + ... + 16395.

Almost surely, 2^121357824 is an apocalyptic number.

121357824 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121357824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184761984).

121357824 is an abundant number, since it is smaller than the sum of its proper divisors (248166144).

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

121357824 is an equidigital number, since it uses as much as digits as its factorization.

121357824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11315 (or 11299 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 121357824 is about 11016.2527204127. The cubic root of 121357824 is about 495.0958206502.

The spelling of 121357824 in words is "one hundred twenty-one million, three hundred fifty-seven thousand, eight hundred twenty-four".