221020221020113 has 2 divisors, whose sum is σ = 221020221020114. Its totient is φ = 221020221020112.

The previous prime is 221020221020099. The next prime is 221020221020167. The reversal of 221020221020113 is 311020122020122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215664292073169 + 5355928946944 = 14685513^2 + 2314288^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221020221020113 is a prime.

It is not a weakly prime, because it can be changed into another prime (221020221026113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510110510056 + 110510110510057.

It is an arithmetic number, because the mean of its divisors is an integer number (110510110510057).

Almost surely, 2^{221020221020113} is an apocalyptic number.

It is an amenable number.

221020221020113 is a deficient number, since it is larger than the sum of its proper divisors (1).

221020221020113 is an equidigital number, since it uses as much as digits as its factorization.

221020221020113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 221020221020113 its reverse (311020122020122), we get a palindrome (532040343040235).

The spelling of 221020221020113 in words is "two hundred twenty-one trillion, twenty billion, two hundred twenty-one million, twenty thousand, one hundred thirteen".