221131104241 has 2 divisors, whose sum is σ = 221131104242. Its totient is φ = 221131104240.

The previous prime is 221131104223. The next prime is 221131104253. The reversal of 221131104241 is 142401131122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136175760400 + 84955343841 = 369020^2 + 291471^2 .

It is a cyclic number.

It is not a de Polignac number, because 221131104241 - 2²¹ = 221129007089 is a prime.

It is not a weakly prime, because it can be changed into another prime (221131104541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110565552120 + 110565552121.

It is an arithmetic number, because the mean of its divisors is an integer number (110565552121).

Almost surely, 2^221131104241 is an apocalyptic number.

It is an amenable number.

221131104241 is a deficient number, since it is larger than the sum of its proper divisors (1).

221131104241 is an equidigital number, since it uses as much as digits as its factorization.

221131104241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 221131104241 its reverse (142401131122), we get a palindrome (363532235363).

The spelling of 221131104241 in words is "two hundred twenty-one billion, one hundred thirty-one million, one hundred four thousand, two hundred forty-one".