212440242244 has 6 divisors (see below), whose sum is σ = 371770423934. Its totient is φ = 106220121120.

The previous prime is 212440242241. The next prime is 212440242247. The reversal of 212440242244 is 442242044212.

It is an interprime number because it is at equal distance from previous prime (212440242241) and next prime (212440242247).

It can be written as a sum of positive squares in only one way, i.e., 212438028100 + 2214144 = 460910^2 + 1488^2 .

It is not an unprimeable number, because it can be changed into a prime (212440242241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26555030277 + ... + 26555030284.

Almost surely, 2^212440242244 is an apocalyptic number.

It is an amenable number.

212440242244 is a deficient number, since it is larger than the sum of its proper divisors (159330181690).

212440242244 is a wasteful number, since it uses less digits than its factorization.

212440242244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53110060565 (or 53110060563 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 31.

Adding to 212440242244 its reverse (442242044212), we get a palindrome (654682286456).

The spelling of 212440242244 in words is "two hundred twelve billion, four hundred forty million, two hundred forty-two thousand, two hundred forty-four".