212100312 has 16 divisors (see below), whose sum is σ = 530250840. Its totient is φ = 70700096.

The previous prime is 212100307. The next prime is 212100337. The reversal of 212100312 is 213001212.

212100312 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 4418733 + ... + 4418780.

Almost surely, 2^212100312 is an apocalyptic number.

It is an amenable number.

212100312 is an abundant number, since it is smaller than the sum of its proper divisors (318150528).

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

212100312 is a wasteful number, since it uses less digits than its factorization.

212100312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8837522 (or 8837518 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 212100312 is about 14563.6640993948. The cubic root of 212100312 is about 596.3672271035.

Adding to 212100312 its reverse (213001212), we get a palindrome (425101524).

The spelling of 212100312 in words is "two hundred twelve million, one hundred thousand, three hundred twelve".