211242441281 has 2 divisors, whose sum is σ = 211242441282. Its totient is φ = 211242441280.

The previous prime is 211242441229. The next prime is 211242441317. The reversal of 211242441281 is 182144242112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138603567025 + 72638874256 = 372295^2 + 269516^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211242441281 is a prime.

It is a super-2 number, since 2×211242441281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211242441581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105621220640 + 105621220641.

It is an arithmetic number, because the mean of its divisors is an integer number (105621220641).

Almost surely, 2^211242441281 is an apocalyptic number.

It is an amenable number.

211242441281 is a deficient number, since it is larger than the sum of its proper divisors (1).

211242441281 is an equidigital number, since it uses as much as digits as its factorization.

211242441281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8192, while the sum is 32.

Adding to 211242441281 its reverse (182144242112), we get a palindrome (393386683393).

The spelling of 211242441281 in words is "two hundred eleven billion, two hundred forty-two million, four hundred forty-one thousand, two hundred eighty-one".