121324520 has 32 divisors (see below), whose sum is σ = 273611520. Its totient is φ = 48417600.

The previous prime is 121324513. The next prime is 121324523. The reversal of 121324520 is 25423121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121324492 and 121324501.

It is not an unprimeable number, because it can be changed into a prime (121324523) 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, 15245 + ... + 21795.

It is an arithmetic number, because the mean of its divisors is an integer number (8550360).

Almost surely, 2^121324520 is an apocalyptic number.

121324520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121324520 is an abundant number, since it is smaller than the sum of its proper divisors (152287000).

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

121324520 is a wasteful number, since it uses less digits than its factorization.

121324520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7025 (or 7021 counting only the distinct ones).

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

The square root of 121324520 is about 11014.7410319081. The cubic root of 121324520 is about 495.0505271009.

Adding to 121324520 its reverse (25423121), we get a palindrome (146747641).

The spelling of 121324520 in words is "one hundred twenty-one million, three hundred twenty-four thousand, five hundred twenty".