212240423433 has 4 divisors (see below), whose sum is σ = 282987231248. Its totient is φ = 141493615620.

The previous prime is 212240423429. The next prime is 212240423471. The reversal of 212240423433 is 334324042212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 212240423433 - 2² = 212240423429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212240423433.

It is not an unprimeable number, because it can be changed into a prime (212240423833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35373403903 + ... + 35373403908.

It is an arithmetic number, because the mean of its divisors is an integer number (70746807812).

Almost surely, 2^212240423433 is an apocalyptic number.

It is an amenable number.

212240423433 is a deficient number, since it is larger than the sum of its proper divisors (70746807815).

212240423433 is an equidigital number, since it uses as much as digits as its factorization.

212240423433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70746807814.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 212240423433 its reverse (334324042212), we get a palindrome (546564465645).

The spelling of 212240423433 in words is "two hundred twelve billion, two hundred forty million, four hundred twenty-three thousand, four hundred thirty-three".