221002221113 has 2 divisors, whose sum is σ = 221002221114. Its totient is φ = 221002221112.

The previous prime is 221002221079. The next prime is 221002221127. The reversal of 221002221113 is 311122200122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201414259264 + 19587961849 = 448792^2 + 139957^2 .

It is a cyclic number.

It is not a de Polignac number, because 221002221113 - 2⁶ = 221002221049 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221002221091 and 221002221100.

It is not a weakly prime, because it can be changed into another prime (221002221173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110501110556 + 110501110557.

It is an arithmetic number, because the mean of its divisors is an integer number (110501110557).

Almost surely, 2^221002221113 is an apocalyptic number.

It is an amenable number.

221002221113 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002221113 is an equidigital number, since it uses as much as digits as its factorization.

221002221113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221002221113 its reverse (311122200122), we get a palindrome (532124421235).

The spelling of 221002221113 in words is "two hundred twenty-one billion, two million, two hundred twenty-one thousand, one hundred thirteen".