221212304002873 has 2 divisors, whose sum is σ = 221212304002874. Its totient is φ = 221212304002872.

The previous prime is 221212304002867. The next prime is 221212304003057. The reversal of 221212304002873 is 378200403212122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217099390209849 + 4112913793024 = 14734293^2 + 2028032^2 .

It is a cyclic number.

It is not a de Polignac number, because 221212304002873 - 2⁵ = 221212304002841 is a prime.

It is not a weakly prime, because it can be changed into another prime (221212304002813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110606152001436 + 110606152001437.

It is an arithmetic number, because the mean of its divisors is an integer number (110606152001437).

Almost surely, 2^{221212304002873} is an apocalyptic number.

It is an amenable number.

221212304002873 is a deficient number, since it is larger than the sum of its proper divisors (1).

221212304002873 is an equidigital number, since it uses as much as digits as its factorization.

221212304002873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 37.

Adding to 221212304002873 its reverse (378200403212122), we get a palindrome (599412707214995).

The spelling of 221212304002873 in words is "two hundred twenty-one trillion, two hundred twelve billion, three hundred four million, two thousand, eight hundred seventy-three".