11223212113 has 4 divisors (see below), whose sum is σ = 11223565168. Its totient is φ = 11222859060.

The previous prime is 11223212083. The next prime is 11223212129. The reversal of 11223212113 is 31121232211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31121232211 = 503 ⋅61871237.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11223212113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11223212153) 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, 123543 + ... + 194188.

It is an arithmetic number, because the mean of its divisors is an integer number (2805891292).

Almost surely, 2^11223212113 is an apocalyptic number.

It is an amenable number.

11223212113 is a deficient number, since it is larger than the sum of its proper divisors (353055).

11223212113 is an equidigital number, since it uses as much as digits as its factorization.

11223212113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353054.

The product of its digits is 144, while the sum is 19.

Adding to 11223212113 its reverse (31121232211), we get a palindrome (42344444324).

The spelling of 11223212113 in words is "eleven billion, two hundred twenty-three million, two hundred twelve thousand, one hundred thirteen".