221002131073 has 2 divisors, whose sum is σ = 221002131074. Its totient is φ = 221002131072.

The previous prime is 221002131019. The next prime is 221002131079. The reversal of 221002131073 is 370131200122.

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., 197790999169 + 23211131904 = 444737^2 + 152352^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221002131073 is a prime.

It is not a weakly prime, because it can be changed into another prime (221002131079) 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, 110501065536 + 110501065537.

It is an arithmetic number, because the mean of its divisors is an integer number (110501065537).

Almost surely, 2^221002131073 is an apocalyptic number.

It is an amenable number.

221002131073 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002131073 is an equidigital number, since it uses as much as digits as its factorization.

221002131073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 22.

Adding to 221002131073 its reverse (370131200122), we get a palindrome (591133331195).

The spelling of 221002131073 in words is "two hundred twenty-one billion, two million, one hundred thirty-one thousand, seventy-three".