211242442241 has 4 divisors (see below), whose sum is σ = 211416592212. Its totient is φ = 211068292272.

The previous prime is 211242442231. The next prime is 211242442273. The reversal of 211242442241 is 142244242112.

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 5112822016 + 206129620225 = 71504^2 + 454015^2 .

It is a cyclic number.

It is not a de Polignac number, because 211242442241 - 2¹⁴ = 211242425857 is a prime.

It is a super-2 number, since 2×211242442241² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211242442231) 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, 87073166 + ... + 87075591.

It is an arithmetic number, because the mean of its divisors is an integer number (52854148053).

Almost surely, 2^211242442241 is an apocalyptic number.

It is an amenable number.

211242442241 is a deficient number, since it is larger than the sum of its proper divisors (174149971).

211242442241 is a wasteful number, since it uses less digits than its factorization.

211242442241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174149970.

The product of its digits is 8192, while the sum is 29.

Adding to 211242442241 its reverse (142244242112), we get a palindrome (353486684353).

The spelling of 211242442241 in words is "two hundred eleven billion, two hundred forty-two million, four hundred forty-two thousand, two hundred forty-one".