212100311 has 4 divisors (see below), whose sum is σ = 212988000. Its totient is φ = 211212624.

The previous prime is 212100307. The next prime is 212100337. The reversal of 212100311 is 113001212.

212100311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212100311 - 2² = 212100307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212100292 and 212100301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212100341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443486 + ... + 443963.

It is an arithmetic number, because the mean of its divisors is an integer number (53247000).

Almost surely, 2^212100311 is an apocalyptic number.

212100311 is a deficient number, since it is larger than the sum of its proper divisors (887689).

212100311 is an equidigital number, since it uses as much as digits as its factorization.

212100311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887688.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 212100311 is about 14563.6640650627. The cubic root of 212100311 is about 596.3672261663.

Adding to 212100311 its reverse (113001212), we get a palindrome (325101523).

Subtracting from 212100311 its reverse (113001212), we obtain a palindrome (99099099).

The spelling of 212100311 in words is "two hundred twelve million, one hundred thousand, three hundred eleven".