212120111210 has 16 divisors (see below), whose sum is σ = 436361371776. Its totient is φ = 72726895248.

The previous prime is 212120111171. The next prime is 212120111219. The reversal of 212120111210 is 12111021212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (212120111219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1515143582 + ... + 1515143721.

It is an arithmetic number, because the mean of its divisors is an integer number (27272585736).

Almost surely, 2^212120111210 is an apocalyptic number.

212120111210 is an abundant number, since it is smaller than the sum of its proper divisors (224241260566).

212120111210 is a wasteful number, since it uses less digits than its factorization.

212120111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030287317.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212120111210 its reverse (12111021212), we get a palindrome (224231132422).

The spelling of 212120111210 in words is "two hundred twelve billion, one hundred twenty million, one hundred eleven thousand, two hundred ten".