212421043 has 2 divisors, whose sum is σ = 212421044. Its totient is φ = 212421042.

The previous prime is 212421029. The next prime is 212421067. The reversal of 212421043 is 340124212.

212421043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212421043 - 2¹⁷ = 212289971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212421043.

It is not a weakly prime, because it can be changed into another prime (212481043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106210521 + 106210522.

It is an arithmetic number, because the mean of its divisors is an integer number (106210522).

Almost surely, 2^212421043 is an apocalyptic number.

212421043 is a deficient number, since it is larger than the sum of its proper divisors (1).

212421043 is an equidigital number, since it uses as much as digits as its factorization.

212421043 is an evil number, because the sum of its binary digits is even.

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

The square root of 212421043 is about 14574.6712827425. The cubic root of 212421043 is about 596.6676779040.

Adding to 212421043 its reverse (340124212), we get a palindrome (552545255).

The spelling of 212421043 in words is "two hundred twelve million, four hundred twenty-one thousand, forty-three".