212321144 has 16 divisors (see below), whose sum is σ = 454974000. Its totient is φ = 90994752.

The previous prime is 212321129. The next prime is 212321167. The reversal of 212321144 is 441123212.

212321144 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1895669 + ... + 1895780.

It is an arithmetic number, because the mean of its divisors is an integer number (28435875).

Almost surely, 2^212321144 is an apocalyptic number.

It is an amenable number.

212321144 is an abundant number, since it is smaller than the sum of its proper divisors (242652856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212321144 is a wasteful number, since it uses less digits than its factorization.

212321144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3791462 (or 3791458 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 212321144 is about 14571.2437355224. The cubic root of 212321144 is about 596.5741280843.

Adding to 212321144 its reverse (441123212), we get a palindrome (653444356).

The spelling of 212321144 in words is "two hundred twelve million, three hundred twenty-one thousand, one hundred forty-four".