212420100043 has 4 divisors (see below), whose sum is σ = 212460744280. Its totient is φ = 212379455808.

The previous prime is 212420100031. The next prime is 212420100047. The reversal of 212420100043 is 340001024212.

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 212420100043 - 2²⁵ = 212386545611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212420100047) 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, 20314278 + ... + 20324731.

It is an arithmetic number, because the mean of its divisors is an integer number (53115186070).

Almost surely, 2^212420100043 is an apocalyptic number.

212420100043 is a deficient number, since it is larger than the sum of its proper divisors (40644237).

212420100043 is an equidigital number, since it uses as much as digits as its factorization.

212420100043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40644236.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 212420100043 its reverse (340001024212), we get a palindrome (552421124255).

The spelling of 212420100043 in words is "two hundred twelve billion, four hundred twenty million, one hundred thousand, forty-three".