11222121121213 has 4 divisors (see below), whose sum is σ = 11222292404448. Its totient is φ = 11221949837980.

The previous prime is 11222121121207. The next prime is 11222121121261. The reversal of 11222121121213 is 31212112122211.

11222121121213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11222121121213 - 2⁵ = 11222121121181 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 (11222127121213) 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, 85543303 + ... + 85674388.

It is an arithmetic number, because the mean of its divisors is an integer number (2805573101112).

Almost surely, 2^{11222121121213} is an apocalyptic number.

It is an amenable number.

11222121121213 is a deficient number, since it is larger than the sum of its proper divisors (171283235).

11222121121213 is an equidigital number, since it uses as much as digits as its factorization.

11222121121213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171283234.

The product of its digits is 192, while the sum is 22.

Adding to 11222121121213 its reverse (31212112122211), we get a palindrome (42434233243424).

The spelling of 11222121121213 in words is "eleven trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred thirteen".