213303030211081 has 2 divisors, whose sum is σ = 213303030211082. Its totient is φ = 213303030211080.

The previous prime is 213303030211049. The next prime is 213303030211127. The reversal of 213303030211081 is 180112030303312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213296794739856 + 6235471225 = 14604684^2 + 78965^2 .

It is a cyclic number.

It is not a de Polignac number, because 213303030211081 - 2⁵ = 213303030211049 is a prime.

It is a super-3 number, since 3×213303030211081³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (213303030011081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106651515105540 + 106651515105541.

It is an arithmetic number, because the mean of its divisors is an integer number (106651515105541).

Almost surely, 2^{213303030211081} is an apocalyptic number.

It is an amenable number.

213303030211081 is a deficient number, since it is larger than the sum of its proper divisors (1).

213303030211081 is an equidigital number, since it uses as much as digits as its factorization.

213303030211081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

Adding to 213303030211081 its reverse (180112030303312), we get a palindrome (393415060514393).

The spelling of 213303030211081 in words is "two hundred thirteen trillion, three hundred three billion, thirty million, two hundred eleven thousand, eighty-one".