211231355441 has 2 divisors, whose sum is σ = 211231355442. Its totient is φ = 211231355440.

The previous prime is 211231355411. The next prime is 211231355443. The reversal of 211231355441 is 144553132112.

211231355441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168411744400 + 42819611041 = 410380^2 + 206929^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211231355441 is a prime.

Together with 211231355443, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 211231355398 and 211231355407.

It is not a weakly prime, because it can be changed into another prime (211231355443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105615677720 + 105615677721.

It is an arithmetic number, because the mean of its divisors is an integer number (105615677721).

Almost surely, 2^211231355441 is an apocalyptic number.

It is an amenable number.

211231355441 is a deficient number, since it is larger than the sum of its proper divisors (1).

211231355441 is an equidigital number, since it uses as much as digits as its factorization.

211231355441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 32.

Adding to 211231355441 its reverse (144553132112), we get a palindrome (355784487553).

The spelling of 211231355441 in words is "two hundred eleven billion, two hundred thirty-one million, three hundred fifty-five thousand, four hundred forty-one".