221100041 has 2 divisors, whose sum is σ = 221100042. Its totient is φ = 221100040.

The previous prime is 221100037. The next prime is 221100059. The reversal of 221100041 is 140001122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196140025 + 24960016 = 14005^2 + 4996^2 .

It is a cyclic number.

It is not a de Polignac number, because 221100041 - 2² = 221100037 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 221099995 and 221100031.

It is not a weakly prime, because it can be changed into another prime (221100241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110550020 + 110550021.

It is an arithmetic number, because the mean of its divisors is an integer number (110550021).

Almost surely, 2^221100041 is an apocalyptic number.

It is an amenable number.

221100041 is a deficient number, since it is larger than the sum of its proper divisors (1).

221100041 is an equidigital number, since it uses as much as digits as its factorization.

221100041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 221100041 is about 14869.4331095708. The cubic root of 221100041 is about 604.6855739302.

Adding to 221100041 its reverse (140001122), we get a palindrome (361101163).

The spelling of 221100041 in words is "two hundred twenty-one million, one hundred thousand, forty-one".