11121122213 has 4 divisors (see below), whose sum is σ = 11127669600. Its totient is φ = 11114574828.

The previous prime is 11121122197. The next prime is 11121122231. The reversal of 11121122213 is 31222112111.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 11121122213 - 2⁴ = 11121122197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121122191 and 11121122200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121122513) 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, 3271145 + ... + 3274542.

It is an arithmetic number, because the mean of its divisors is an integer number (2781917400).

Almost surely, 2^11121122213 is an apocalyptic number.

It is an amenable number.

11121122213 is a deficient number, since it is larger than the sum of its proper divisors (6547387).

11121122213 is an equidigital number, since it uses as much as digits as its factorization.

11121122213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6547386.

The product of its digits is 48, while the sum is 17.

Adding to 11121122213 its reverse (31222112111), we get a palindrome (42343234324).

The spelling of 11121122213 in words is "eleven billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred thirteen".