212120124 has 48 divisors (see below), whose sum is σ = 505306368. Its totient is φ = 69239808.

The previous prime is 212120107. The next prime is 212120137. The reversal of 212120124 is 421021212.

212120124 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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154489 + ... + 155855.

It is an arithmetic number, because the mean of its divisors is an integer number (10527216).

Almost surely, 2^212120124 is an apocalyptic number.

It is an amenable number.

212120124 is an abundant number, since it is smaller than the sum of its proper divisors (293186244).

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

212120124 is a wasteful number, since it uses less digits than its factorization.

212120124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634 (or 1632 counting only the distinct ones).

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

The square root of 212120124 is about 14564.3442694822. The cubic root of 212120124 is about 596.3857951410.

Adding to 212120124 its reverse (421021212), we get a palindrome (633141336).

The spelling of 212120124 in words is "two hundred twelve million, one hundred twenty thousand, one hundred twenty-four".