221042042113 has 2 divisors, whose sum is σ = 221042042114. Its totient is φ = 221042042112.

The previous prime is 221042042069. The next prime is 221042042203. The reversal of 221042042113 is 311240240122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221039141904 + 2900209 = 470148^2 + 1703^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221042042113 is a prime.

It is not a weakly prime, because it can be changed into another prime (221042049113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110521021056 + 110521021057.

It is an arithmetic number, because the mean of its divisors is an integer number (110521021057).

Almost surely, 2^221042042113 is an apocalyptic number.

It is an amenable number.

221042042113 is a deficient number, since it is larger than the sum of its proper divisors (1).

221042042113 is an equidigital number, since it uses as much as digits as its factorization.

221042042113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 221042042113 its reverse (311240240122), we get a palindrome (532282282235).

The spelling of 221042042113 in words is "two hundred twenty-one billion, forty-two million, forty-two thousand, one hundred thirteen".