212304424243 has 4 divisors (see below), whose sum is σ = 221535051408. Its totient is φ = 203073797080.

The previous prime is 212304424237. The next prime is 212304424253. The reversal of 212304424243 is 342424403212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212304424243 - 2⁹ = 212304423731 is a prime.

It is a super-2 number, since 2×212304424243² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212304424253) 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, 4615313548 + ... + 4615313593.

It is an arithmetic number, because the mean of its divisors is an integer number (55383762852).

Almost surely, 2^212304424243 is an apocalyptic number.

212304424243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

212304424243 is a deficient number, since it is larger than the sum of its proper divisors (9230627165).

212304424243 is an equidigital number, since it uses as much as digits as its factorization.

212304424243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9230627164.

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 212304424243 its reverse (342424403212), we get a palindrome (554728827455).

The spelling of 212304424243 in words is "two hundred twelve billion, three hundred four million, four hundred twenty-four thousand, two hundred forty-three".