212121431443 has 4 divisors (see below), whose sum is σ = 212144429880. Its totient is φ = 212098433008.

The previous prime is 212121431429. The next prime is 212121431447. The reversal of 212121431443 is 344134121212.

It is a happy number.

212121431443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 212121431443 - 2⁹ = 212121430931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212121431447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11485378 + ... + 11503831.

It is an arithmetic number, because the mean of its divisors is an integer number (53036107470).

Almost surely, 2^212121431443 is an apocalyptic number.

212121431443 is a deficient number, since it is larger than the sum of its proper divisors (22998437).

212121431443 is an equidigital number, since it uses as much as digits as its factorization.

212121431443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22998436.

The product of its digits is 4608, while the sum is 28.

Adding to 212121431443 its reverse (344134121212), we get a palindrome (556255552655).

The spelling of 212121431443 in words is "two hundred twelve billion, one hundred twenty-one million, four hundred thirty-one thousand, four hundred forty-three".