212111210 has 32 divisors (see below), whose sum is σ = 406985472. Its totient is φ = 79315200.

The previous prime is 212111177. The next prime is 212111219. The reversal of 212111210 is 12111212.

212111210 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 212111191 and 212111200.

It is not an unprimeable number, because it can be changed into a prime (212111219) 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, 21539 + ... + 29801.

It is an arithmetic number, because the mean of its divisors is an integer number (12718296).

Almost surely, 2^212111210 is an apocalyptic number.

212111210 is a deficient number, since it is larger than the sum of its proper divisors (194874262).

212111210 is a wasteful number, since it uses less digits than its factorization.

212111210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8438.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 212111210 is about 14564.0382449374. The cubic root of 212111210 is about 596.3774409793.

Adding to 212111210 its reverse (12111212), we get a palindrome (224222422).

It can be divided in two parts, 2121 and 11210, that added together give a palindrome (13331).

The spelling of 212111210 in words is "two hundred twelve million, one hundred eleven thousand, two hundred ten".