221604051041 has 2 divisors, whose sum is σ = 221604051042. Its totient is φ = 221604051040.

The previous prime is 221604051001. The next prime is 221604051077. The reversal of 221604051041 is 140150406122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218411349025 + 3192702016 = 467345^2 + 56504^2 .

It is a cyclic number.

It is not a de Polignac number, because 221604051041 - 2¹⁸ = 221603788897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221604051041.

It is not a weakly prime, because it can be changed into another prime (221604051001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110802025520 + 110802025521.

It is an arithmetic number, because the mean of its divisors is an integer number (110802025521).

Almost surely, 2^221604051041 is an apocalyptic number.

It is an amenable number.

221604051041 is a deficient number, since it is larger than the sum of its proper divisors (1).

221604051041 is an equidigital number, since it uses as much as digits as its factorization.

221604051041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 221604051041 its reverse (140150406122), we get a palindrome (361754457163).

The spelling of 221604051041 in words is "two hundred twenty-one billion, six hundred four million, fifty-one thousand, forty-one".