221132142641 has 2 divisors, whose sum is σ = 221132142642. Its totient is φ = 221132142640.

The previous prime is 221132142607. The next prime is 221132142653. The reversal of 221132142641 is 146241231122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151084580416 + 70047562225 = 388696^2 + 264665^2 .

It is a cyclic number.

It is not a de Polignac number, because 221132142641 - 2³⁴ = 203952273457 is a prime.

It is not a weakly prime, because it can be changed into another prime (221132142661) 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, 110566071320 + 110566071321.

It is an arithmetic number, because the mean of its divisors is an integer number (110566071321).

Almost surely, 2^221132142641 is an apocalyptic number.

It is an amenable number.

221132142641 is a deficient number, since it is larger than the sum of its proper divisors (1).

221132142641 is an equidigital number, since it uses as much as digits as its factorization.

221132142641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 29.

Adding to 221132142641 its reverse (146241231122), we get a palindrome (367373373763).

The spelling of 221132142641 in words is "two hundred twenty-one billion, one hundred thirty-two million, one hundred forty-two thousand, six hundred forty-one".