11123120213 has 8 divisors (see below), whose sum is σ = 11970495000. Its totient is φ = 10297198080.

The previous prime is 11123120209. The next prime is 11123120263. The reversal of 11123120213 is 31202132111.

It can be written as a sum of positive squares in 4 ways, for example, as 121837444 + 11001282769 = 11038^2 + 104887^2 .

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 11123120213 - 2² = 11123120209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11123120191 and 11123120200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123120263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5362088 + ... + 5364161.

It is an arithmetic number, because the mean of its divisors is an integer number (1496311875).

Almost surely, 2^11123120213 is an apocalyptic number.

It is an amenable number.

11123120213 is a deficient number, since it is larger than the sum of its proper divisors (847374787).

11123120213 is a wasteful number, since it uses less digits than its factorization.

11123120213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10726327.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11123120213 its reverse (31202132111), we get a palindrome (42325252324).

The spelling of 11123120213 in words is "eleven billion, one hundred twenty-three million, one hundred twenty thousand, two hundred thirteen".