121530224 has 10 divisors (see below), whose sum is σ = 235464840. Its totient is φ = 60765104.

The previous prime is 121530209. The next prime is 121530293. The reversal of 121530224 is 422035121.

It is a junction number, because it is equal to n+sod(n) for n = 121530196 and 121530205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3797804 + ... + 3797835.

It is an arithmetic number, because the mean of its divisors is an integer number (23546484).

Almost surely, 2^121530224 is an apocalyptic number.

It is an amenable number.

121530224 is a deficient number, since it is larger than the sum of its proper divisors (113934616).

121530224 is an equidigital number, since it uses as much as digits as its factorization.

121530224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7595647 (or 7595641 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 121530224 is about 11024.0747457553. The cubic root of 121530224 is about 495.3301528384.

Adding to 121530224 its reverse (422035121), we get a palindrome (543565345).

The spelling of 121530224 in words is "one hundred twenty-one million, five hundred thirty thousand, two hundred twenty-four".