212242241 has 4 divisors (see below), whose sum is σ = 215721684. Its totient is φ = 208762800.

The previous prime is 212242237. The next prime is 212242253. The reversal of 212242241 is 142242212.

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 121440400 + 90801841 = 11020^2 + 9529^2 .

It is a cyclic number.

It is not a de Polignac number, because 212242241 - 2² = 212242237 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212242201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1739630 + ... + 1739751.

It is an arithmetic number, because the mean of its divisors is an integer number (53930421).

Almost surely, 2^212242241 is an apocalyptic number.

It is an amenable number.

212242241 is a deficient number, since it is larger than the sum of its proper divisors (3479443).

212242241 is an equidigital number, since it uses as much as digits as its factorization.

212242241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3479442.

The product of its digits is 512, while the sum is 20.

The square root of 212242241 is about 14568.5359937092. The cubic root of 212242241 is about 596.5002190996.

Adding to 212242241 its reverse (142242212), we get a palindrome (354484453).

The spelling of 212242241 in words is "two hundred twelve million, two hundred forty-two thousand, two hundred forty-one".