11213220113 has 4 divisors (see below), whose sum is σ = 11215767780. Its totient is φ = 11210672448.

The previous prime is 11213220047. The next prime is 11213220119. The reversal of 11213220113 is 31102231211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31102231211 = 31 ⋅1003297781.

It can be written as a sum of positive squares in 2 ways, for example, as 1861749904 + 9351470209 = 43148^2 + 96703^2 .

It is a cyclic number.

It is not a de Polignac number, because 11213220113 - 2¹⁰ = 11213219089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11213220091 and 11213220100.

It is not an unprimeable number, because it can be changed into a prime (11213220119) 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, 1267220 + ... + 1276037.

It is an arithmetic number, because the mean of its divisors is an integer number (2803941945).

Almost surely, 2^11213220113 is an apocalyptic number.

It is an amenable number.

11213220113 is a deficient number, since it is larger than the sum of its proper divisors (2547667).

11213220113 is an equidigital number, since it uses as much as digits as its factorization.

11213220113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2547666.

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

Adding to 11213220113 its reverse (31102231211), we get a palindrome (42315451324).

The spelling of 11213220113 in words is "eleven billion, two hundred thirteen million, two hundred twenty thousand, one hundred thirteen".