211541242441 has 4 divisors (see below), whose sum is σ = 215532586692. Its totient is φ = 207549898192.

The previous prime is 211541242427. The next prime is 211541242489. The reversal of 211541242441 is 144242145112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 145069574400 + 66471668041 = 380880^2 + 257821^2 .

It is a cyclic number.

It is not a de Polignac number, because 211541242441 - 2³⁷ = 74102288969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211541242741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1995672046 + ... + 1995672151.

It is an arithmetic number, because the mean of its divisors is an integer number (53883146673).

Almost surely, 2^211541242441 is an apocalyptic number.

It is an amenable number.

211541242441 is a deficient number, since it is larger than the sum of its proper divisors (3991344251).

211541242441 is an equidigital number, since it uses as much as digits as its factorization.

211541242441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3991344250.

The product of its digits is 10240, while the sum is 31.

Adding to 211541242441 its reverse (144242145112), we get a palindrome (355783387553).

The spelling of 211541242441 in words is "two hundred eleven billion, five hundred forty-one million, two hundred forty-two thousand, four hundred forty-one".