11113132221 has 6 divisors (see below), whose sum is σ = 16052302110. Its totient is φ = 7408754808.

The previous prime is 11113132183. The next prime is 11113132229. The reversal of 11113132221 is 12223131111.

It can be written as a sum of positive squares in only one way, i.e., 8834120100 + 2279012121 = 93990^2 + 47739^2 .

It is not a de Polignac number, because 11113132221 - 2⁹ = 11113131709 is a prime.

It is a super-2 number, since 2×11113132221² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11113132194 and 11113132203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11113132229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 617396226 + ... + 617396243.

It is an arithmetic number, because the mean of its divisors is an integer number (2675383685).

Almost surely, 2^11113132221 is an apocalyptic number.

It is an amenable number.

11113132221 is a deficient number, since it is larger than the sum of its proper divisors (4939169889).

11113132221 is a wasteful number, since it uses less digits than its factorization.

11113132221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234792475 (or 1234792472 counting only the distinct ones).

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

Adding to 11113132221 its reverse (12223131111), we get a palindrome (23336263332).

The spelling of 11113132221 in words is "eleven billion, one hundred thirteen million, one hundred thirty-two thousand, two hundred twenty-one".