221133113 has 4 divisors (see below), whose sum is σ = 224758308. Its totient is φ = 217507920.

The previous prime is 221133103. The next prime is 221133139. The reversal of 221133113 is 311331122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75134224 + 145998889 = 8668^2 + 12083^2 .

It is a cyclic number.

It is not a de Polignac number, because 221133113 - 2¹⁶ = 221067577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221133091 and 221133100.

It is not an unprimeable number, because it can be changed into a prime (221133103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1812506 + ... + 1812627.

It is an arithmetic number, because the mean of its divisors is an integer number (56189577).

Almost surely, 2^221133113 is an apocalyptic number.

It is an amenable number.

221133113 is a deficient number, since it is larger than the sum of its proper divisors (3625195).

221133113 is an equidigital number, since it uses as much as digits as its factorization.

221133113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3625194.

The product of its digits is 108, while the sum is 17.

The square root of 221133113 is about 14870.5451480435. The cubic root of 221133113 is about 604.7157219184.

Adding to 221133113 its reverse (311331122), we get a palindrome (532464235).

The spelling of 221133113 in words is "two hundred twenty-one million, one hundred thirty-three thousand, one hundred thirteen".