121307824 has 30 divisors (see below), whose sum is σ = 258347180. Its totient is φ = 55139040.

The previous prime is 121307821. The next prime is 121307861. The reversal of 121307824 is 428703121.

It is a super-2 number, since 2×121307824² = 29431176327229952, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121307792 and 121307801.

It is not an unprimeable number, because it can be changed into a prime (121307821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29394 + ... + 33265.

Almost surely, 2^121307824 is an apocalyptic number.

It is an amenable number.

121307824 is an abundant number, since it is smaller than the sum of its proper divisors (137039356).

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

121307824 is a wasteful number, since it uses less digits than its factorization.

121307824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62689 (or 62672 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 121307824 is about 11013.9831123895. The cubic root of 121307824 is about 495.0278173668.

The spelling of 121307824 in words is "one hundred twenty-one million, three hundred seven thousand, eight hundred twenty-four".