11323111221 has 12 divisors (see below), whose sum is σ = 16797648972. Its totient is φ = 7344720576.

The previous prime is 11323111213. The next prime is 11323111271. The reversal of 11323111221 is 12211132311.

11323111221 is a `hidden beast` number, since 1 + 132 + 311 + 1 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10275876900 + 1047234321 = 101370^2 + 32361^2 .

It is not a de Polignac number, because 11323111221 - 2³ = 11323111213 is a prime.

It is a super-2 number, since 2×11323111221² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11323111194 and 11323111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11323111271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17001336 + ... + 17002001.

It is an arithmetic number, because the mean of its divisors is an integer number (1399804081).

Almost surely, 2^11323111221 is an apocalyptic number.

It is an amenable number.

11323111221 is a deficient number, since it is larger than the sum of its proper divisors (5474537751).

11323111221 is a wasteful number, since it uses less digits than its factorization.

11323111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34003380 (or 34003377 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 11323111221 its reverse (12211132311), we get a palindrome (23534243532).

The spelling of 11323111221 in words is "eleven billion, three hundred twenty-three million, one hundred eleven thousand, two hundred twenty-one".