1123220013 has 8 divisors (see below), whose sum is σ = 1499039808. Its totient is φ = 748106784.

The previous prime is 1123219997. The next prime is 1123220027. The reversal of 1123220013 is 3100223211.

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

It is not a de Polignac number, because 1123220013 - 2⁴ = 1123219997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1123219974 and 1123220001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123220513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172920 + ... + 179297.

It is an arithmetic number, because the mean of its divisors is an integer number (187379976).

Almost surely, 2^1123220013 is an apocalyptic number.

It is an amenable number.

1123220013 is a deficient number, since it is larger than the sum of its proper divisors (375819795).

1123220013 is a wasteful number, since it uses less digits than its factorization.

1123220013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353283.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1123220013 is about 33514.4746788608. The cubic root of 1123220013 is about 1039.4931001770.

Adding to 1123220013 its reverse (3100223211), we get a palindrome (4223443224).

The spelling of 1123220013 in words is "one billion, one hundred twenty-three million, two hundred twenty thousand, thirteen".