221123113241 has 4 divisors (see below), whose sum is σ = 221127934500. Its totient is φ = 221118291984.

The previous prime is 221123113219. The next prime is 221123113297. The reversal of 221123113241 is 142311321122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 142311321122 = 2 ⋅71155660561.

It can be written as a sum of positive squares in 2 ways, for example, as 196799591641 + 24323521600 = 443621^2 + 155960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221123113241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221123116241) 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, 2341166 + ... + 2433783.

It is an arithmetic number, because the mean of its divisors is an integer number (55281983625).

Almost surely, 2^221123113241 is an apocalyptic number.

It is an amenable number.

221123113241 is a deficient number, since it is larger than the sum of its proper divisors (4821259).

221123113241 is an equidigital number, since it uses as much as digits as its factorization.

221123113241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4821258.

The product of its digits is 576, while the sum is 23.

Adding to 221123113241 its reverse (142311321122), we get a palindrome (363434434363).

The spelling of 221123113241 in words is "two hundred twenty-one billion, one hundred twenty-three million, one hundred thirteen thousand, two hundred forty-one".