212012043 has 4 divisors (see below), whose sum is σ = 282682728. Its totient is φ = 141341360.

The previous prime is 212012033. The next prime is 212012057. The reversal of 212012043 is 340210212.

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 212012043 - 2⁶ = 212011979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212012033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35335338 + ... + 35335343.

It is an arithmetic number, because the mean of its divisors is an integer number (70670682).

Almost surely, 2^212012043 is an apocalyptic number.

212012043 is a deficient number, since it is larger than the sum of its proper divisors (70670685).

212012043 is an equidigital number, since it uses as much as digits as its factorization.

212012043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70670684.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 212012043 is about 14560.6333310059. The cubic root of 212012043 is about 596.2844863123.

Adding to 212012043 its reverse (340210212), we get a palindrome (552222255).

The spelling of 212012043 in words is "two hundred twelve million, twelve thousand, forty-three".