211303132081 has 2 divisors, whose sum is σ = 211303132082. Its totient is φ = 211303132080.

The previous prime is 211303132043. The next prime is 211303132093. The reversal of 211303132081 is 180231303112.

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., 185881699600 + 25421432481 = 431140^2 + 159441^2 .

It is a cyclic number.

It is not a de Polignac number, because 211303132081 - 2²¹ = 211301034929 is a prime.

It is a super-2 number, since 2×211303132081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211303132981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105651566040 + 105651566041.

It is an arithmetic number, because the mean of its divisors is an integer number (105651566041).

Almost surely, 2^211303132081 is an apocalyptic number.

It is an amenable number.

211303132081 is a deficient number, since it is larger than the sum of its proper divisors (1).

211303132081 is an equidigital number, since it uses as much as digits as its factorization.

211303132081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 211303132081 its reverse (180231303112), we get a palindrome (391534435193).

The spelling of 211303132081 in words is "two hundred eleven billion, three hundred three million, one hundred thirty-two thousand, eighty-one".