11122111211221 has 8 divisors (see below), whose sum is σ = 11506641984000. Its totient is φ = 10737647751600.

The previous prime is 11122111211213. The next prime is 11122111211227. The reversal of 11122111211221 is 12211211122111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11122111211221 - 2³ = 11122111211213 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 (11122111211227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16492005 + ... + 17153146.

It is an arithmetic number, because the mean of its divisors is an integer number (1438330248000).

Almost surely, 2^{11122111211221} is an apocalyptic number.

It is an amenable number.

11122111211221 is a deficient number, since it is larger than the sum of its proper divisors (384530772779).

11122111211221 is a wasteful number, since it uses less digits than its factorization.

11122111211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33656579.

The product of its digits is 32, while the sum is 19.

Adding to 11122111211221 its reverse (12211211122111), we get a palindrome (23333322333332).

The spelling of 11122111211221 in words is "eleven trillion, one hundred twenty-two billion, one hundred eleven million, two hundred eleven thousand, two hundred twenty-one".