211020242 has 16 divisors (see below), whose sum is σ = 322985880. Its totient is φ = 103364352.

The previous prime is 211020241. The next prime is 211020247. The reversal of 211020242 is 242020112.

It can be written as a sum of positive squares in 4 ways, for example, as 157276681 + 53743561 = 12541^2 + 7331^2 .

It is not an unprimeable number, because it can be changed into a prime (211020241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105968 + ... + 107940.

Almost surely, 2^211020242 is an apocalyptic number.

211020242 is a deficient number, since it is larger than the sum of its proper divisors (111965638).

211020242 is a wasteful number, since it uses less digits than its factorization.

211020242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3037.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 211020242 is about 14526.5357879985. The cubic root of 211020242 is about 595.3532182320.

Adding to 211020242 its reverse (242020112), we get a palindrome (453040354).

The spelling of 211020242 in words is "two hundred eleven million, twenty thousand, two hundred forty-two".