11222121311 has 8 divisors (see below), whose sum is σ = 11883716784. Its totient is φ = 10560689280.

The previous prime is 11222121307. The next prime is 11222121319. The reversal of 11222121311 is 11312122211.

It is a happy number.

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 11222121311 - 2² = 11222121307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11222121311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222121319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118241 + ... + 190853.

It is an arithmetic number, because the mean of its divisors is an integer number (1485464598).

Almost surely, 2^11222121311 is an apocalyptic number.

11222121311 is a deficient number, since it is larger than the sum of its proper divisors (661595473).

11222121311 is an equidigital number, since it uses as much as digits as its factorization.

11222121311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81721.

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

Adding to 11222121311 its reverse (11312122211), we get a palindrome (22534243522).

The spelling of 11222121311 in words is "eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, three hundred eleven".