11213222111 has 16 divisors (see below), whose sum is σ = 13814842944. Its totient is φ = 8863029504.

The previous prime is 11213222107. The next prime is 11213222123. The reversal of 11213222111 is 11122231211.

It is a happy number.

It is not a de Polignac number, because 11213222111 - 2² = 11213222107 is a prime.

It is a super-2 number, since 2×11213222111² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11213222111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213222311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28931 + ... + 152523.

It is an arithmetic number, because the mean of its divisors is an integer number (863427684).

Almost surely, 2^11213222111 is an apocalyptic number.

11213222111 is a deficient number, since it is larger than the sum of its proper divisors (2601620833).

11213222111 is a wasteful number, since it uses less digits than its factorization.

11213222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124610.

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

Adding to 11213222111 its reverse (11122231211), we get a palindrome (22335453322).

The spelling of 11213222111 in words is "eleven billion, two hundred thirteen million, two hundred twenty-two thousand, one hundred eleven".