11205223013 has 4 divisors (see below), whose sum is σ = 11287013100. Its totient is φ = 11123432928.

The previous prime is 11205222989. The next prime is 11205223027. The reversal of 11205223013 is 31032250211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7874432644 + 3330790369 = 88738^2 + 57713^2 .

It is a cyclic number.

It is not a de Polignac number, because 11205223013 - 2¹⁶ = 11205157477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11205223033) 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, 40894838 + ... + 40895111.

It is an arithmetic number, because the mean of its divisors is an integer number (2821753275).

Almost surely, 2^11205223013 is an apocalyptic number.

It is an amenable number.

11205223013 is a deficient number, since it is larger than the sum of its proper divisors (81790087).

11205223013 is an equidigital number, since it uses as much as digits as its factorization.

11205223013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81790086.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 11205223013 its reverse (31032250211), we get a palindrome (42237473224).

The spelling of 11205223013 in words is "eleven billion, two hundred five million, two hundred twenty-three thousand, thirteen".