212143241242 has 8 divisors (see below), whose sum is σ = 318534037236. Its totient is φ = 105965228832.

The previous prime is 212143241227. The next prime is 212143241251. The reversal of 212143241242 is 242142341212.

It can be written as a sum of positive squares in 2 ways, for example, as 209737436841 + 2405804401 = 457971^2 + 49049^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×212143241242² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212143241242.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53193403 + ... + 53197390.

Almost surely, 2^212143241242 is an apocalyptic number.

212143241242 is a deficient number, since it is larger than the sum of its proper divisors (106390795994).

212143241242 is a wasteful number, since it uses less digits than its factorization.

212143241242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106391792.

The product of its digits is 6144, while the sum is 28.

Adding to 212143241242 its reverse (242142341212), we get a palindrome (454285582454).

The spelling of 212143241242 in words is "two hundred twelve billion, one hundred forty-three million, two hundred forty-one thousand, two hundred forty-two".