221342115641 has 2 divisors, whose sum is σ = 221342115642. Its totient is φ = 221342115640.

The previous prime is 221342115629. The next prime is 221342115661. The reversal of 221342115641 is 146511243122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221167981225 + 174134416 = 470285^2 + 13196^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221342115641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221342115598 and 221342115607.

It is not a weakly prime, because it can be changed into another prime (221342115661) 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, 110671057820 + 110671057821.

It is an arithmetic number, because the mean of its divisors is an integer number (110671057821).

Almost surely, 2^221342115641 is an apocalyptic number.

It is an amenable number.

221342115641 is a deficient number, since it is larger than the sum of its proper divisors (1).

221342115641 is an equidigital number, since it uses as much as digits as its factorization.

221342115641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 32.

Adding to 221342115641 its reverse (146511243122), we get a palindrome (367853358763).

The spelling of 221342115641 in words is "two hundred twenty-one billion, three hundred forty-two million, one hundred fifteen thousand, six hundred forty-one".