221124113 has 6 divisors (see below), whose sum is σ = 257226066. Its totient is φ = 189534912.

The previous prime is 221124107. The next prime is 221124131. The reversal of 221124113 is 311421122.

It can be written as a sum of positive squares in only one way, i.e., 203718529 + 17405584 = 14273^2 + 4172^2 .

It is not a de Polignac number, because 221124113 - 2⁴ = 221124097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221124091 and 221124100.

It is not an unprimeable number, because it can be changed into a prime (221124133) 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, 2256320 + ... + 2256417.

It is an arithmetic number, because the mean of its divisors is an integer number (42871011).

Almost surely, 2^221124113 is an apocalyptic number.

It is an amenable number.

221124113 is a deficient number, since it is larger than the sum of its proper divisors (36101953).

221124113 is an equidigital number, since it uses as much as digits as its factorization.

221124113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4512751 (or 4512744 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 221124113 is about 14870.2425333281. The cubic root of 221124113 is about 604.7075179377.

Adding to 221124113 its reverse (311421122), we get a palindrome (532545235).

The spelling of 221124113 in words is "two hundred twenty-one million, one hundred twenty-four thousand, one hundred thirteen".