11211211122223 has 32 divisors (see below), whose sum is σ = 13090192040960. Its totient is φ = 9403792070400.

The previous prime is 11211211122127. The next prime is 11211211122227. The reversal of 11211211122223 is 32222111211211.

It is not a de Polignac number, because 11211211122223 - 2²⁵ = 11211177567791 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11211211122194 and 11211211122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211211122227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63878836 + ... + 64054102.

It is an arithmetic number, because the mean of its divisors is an integer number (409068501280).

Almost surely, 2^{11211211122223} is an apocalyptic number.

11211211122223 is a deficient number, since it is larger than the sum of its proper divisors (1878980918737).

11211211122223 is a wasteful number, since it uses less digits than its factorization.

11211211122223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176327.

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

Adding to 11211211122223 its reverse (32222111211211), we get a palindrome (43433322333434).

The spelling of 11211211122223 in words is "eleven trillion, two hundred eleven billion, two hundred eleven million, one hundred twenty-two thousand, two hundred twenty-three".