11513223203 has 4 divisors (see below), whose sum is σ = 11615110248. Its totient is φ = 11411336160.

The previous prime is 11513223199. The next prime is 11513223221. The reversal of 11513223203 is 30232231511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30232231511 = 839 ⋅36033649.

It is a cyclic number.

It is not a de Polignac number, because 11513223203 - 2² = 11513223199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11513223263) 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, 50943353 + ... + 50943578.

It is an arithmetic number, because the mean of its divisors is an integer number (2903777562).

Almost surely, 2^11513223203 is an apocalyptic number.

11513223203 is a deficient number, since it is larger than the sum of its proper divisors (101887045).

11513223203 is a wasteful number, since it uses less digits than its factorization.

11513223203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101887044.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 11513223203 its reverse (30232231511), we get a palindrome (41745454714).

The spelling of 11513223203 in words is "eleven billion, five hundred thirteen million, two hundred twenty-three thousand, two hundred three".