1224720113 has 4 divisors (see below), whose sum is σ = 1229599728. Its totient is φ = 1219840500.

The previous prime is 1224720097. The next prime is 1224720121. The reversal of 1224720113 is 3110274221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1224720113 - 2⁴ = 1224720097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1224020113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2439431 + ... + 2439932.

It is an arithmetic number, because the mean of its divisors is an integer number (307399932).

Almost surely, 2^1224720113 is an apocalyptic number.

It is an amenable number.

1224720113 is a deficient number, since it is larger than the sum of its proper divisors (4879615).

1224720113 is an equidigital number, since it uses as much as digits as its factorization.

1224720113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4879614.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1224720113 is about 34996.0013858726. The cubic root of 1224720113 is about 1069.9059844027.

Adding to 1224720113 its reverse (3110274221), we get a palindrome (4334994334).

The spelling of 1224720113 in words is "one billion, two hundred twenty-four million, seven hundred twenty thousand, one hundred thirteen".