212312130 has 16 divisors (see below), whose sum is σ = 509549184. Its totient is φ = 56616560.

The previous prime is 212312129. The next prime is 212312141. The reversal of 212312130 is 31213212.

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

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3538506 + ... + 3538565.

It is an arithmetic number, because the mean of its divisors is an integer number (31846824).

Almost surely, 2^212312130 is an apocalyptic number.

212312130 is an abundant number, since it is smaller than the sum of its proper divisors (297237054).

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

212312130 is a wasteful number, since it uses less digits than its factorization.

212312130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7077081.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 212312130 is about 14570.9344243943. The cubic root of 212312130 is about 596.5656855348.

Adding to 212312130 its reverse (31213212), we get a palindrome (243525342).

The spelling of 212312130 in words is "two hundred twelve million, three hundred twelve thousand, one hundred thirty".