11123220013 has 2 divisors, whose sum is σ = 11123220014. Its totient is φ = 11123220012.

The previous prime is 11123220001. The next prime is 11123220023. The reversal of 11123220013 is 31002232111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9885728329 + 1237491684 = 99427^2 + 35178^2 .

It is a cyclic number.

It is not a de Polignac number, because 11123220013 - 2¹³ = 11123211821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11123220023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561610006 + 5561610007.

It is an arithmetic number, because the mean of its divisors is an integer number (5561610007).

Almost surely, 2^11123220013 is an apocalyptic number.

It is an amenable number.

11123220013 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123220013 is an equidigital number, since it uses as much as digits as its factorization.

11123220013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 11123220013 its reverse (31002232111), we get a palindrome (42125452124).

The spelling of 11123220013 in words is "eleven billion, one hundred twenty-three million, two hundred twenty thousand, thirteen".