212421044 has 12 divisors (see below), whose sum is σ = 405531168. Its totient is φ = 96555000.

The previous prime is 212421043. The next prime is 212421067. The reversal of 212421044 is 440124212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212421043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2413832 + ... + 2413919.

It is an arithmetic number, because the mean of its divisors is an integer number (33794264).

Almost surely, 2^212421044 is an apocalyptic number.

It is an amenable number.

212421044 is a deficient number, since it is larger than the sum of its proper divisors (193110124).

212421044 is a wasteful number, since it uses less digits than its factorization.

212421044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4827766 (or 4827764 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 212421044 is about 14574.6713170486. The cubic root of 212421044 is about 596.6676788403.

Adding to 212421044 its reverse (440124212), we get a palindrome (652545256).

The spelling of 212421044 in words is "two hundred twelve million, four hundred twenty-one thousand, forty-four".