212124120 has 64 divisors (see below), whose sum is σ = 685329120. Its totient is φ = 52214784.

The previous prime is 212124109. The next prime is 212124127. The reversal of 212124120 is 21421212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 212124120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212124127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66429 + ... + 69548.

Almost surely, 2^212124120 is an apocalyptic number.

212124120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212124120 is an abundant number, since it is smaller than the sum of its proper divisors (473205000).

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

212124120 is a wasteful number, since it uses less digits than its factorization.

212124120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136004 (or 136000 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 212124120 is about 14564.4814531792. The cubic root of 212124120 is about 596.3895400987.

Adding to 212124120 its reverse (21421212), we get a palindrome (233545332).

The spelling of 212124120 in words is "two hundred twelve million, one hundred twenty-four thousand, one hundred twenty".