211242241 has 4 divisors (see below), whose sum is σ = 241419712. Its totient is φ = 181064772.

The previous prime is 211242233. The next prime is 211242271. The reversal of 211242241 is 142242112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 211242241 - 2³ = 211242233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211242271) 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, 15088725 + ... + 15088738.

It is an arithmetic number, because the mean of its divisors is an integer number (60354928).

Almost surely, 2^211242241 is an apocalyptic number.

It is an amenable number.

211242241 is a deficient number, since it is larger than the sum of its proper divisors (30177471).

211242241 is an equidigital number, since it uses as much as digits as its factorization.

211242241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30177470.

The product of its digits is 256, while the sum is 19.

The square root of 211242241 is about 14534.1749335833. The cubic root of 211242241 is about 595.5619209562.

Adding to 211242241 its reverse (142242112), we get a palindrome (353484353).

The spelling of 211242241 in words is "two hundred eleven million, two hundred forty-two thousand, two hundred forty-one".