121224513 has 8 divisors (see below), whose sum is σ = 168660288. Its totient is φ = 77302544.

The previous prime is 121224491. The next prime is 121224517. The reversal of 121224513 is 315422121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121224513 - 2⁶ = 121224449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121224513.

It is not an unprimeable number, because it can be changed into a prime (121224517) 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, 878370 + ... + 878507.

It is an arithmetic number, because the mean of its divisors is an integer number (21082536).

Almost surely, 2^121224513 is an apocalyptic number.

It is an amenable number.

121224513 is a deficient number, since it is larger than the sum of its proper divisors (47435775).

121224513 is a wasteful number, since it uses less digits than its factorization.

121224513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756903.

The product of its digits is 480, while the sum is 21.

The square root of 121224513 is about 11010.2004068954. The cubic root of 121224513 is about 494.9144674171.

Adding to 121224513 its reverse (315422121), we get a palindrome (436646634).

The spelling of 121224513 in words is "one hundred twenty-one million, two hundred twenty-four thousand, five hundred thirteen".