111212221210 has 16 divisors (see below), whose sum is σ = 200681212392. Its totient is φ = 44373952000.

The previous prime is 111212221193. The next prime is 111212221213. The reversal of 111212221210 is 12122212111.

111212221210 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 104806940121 + 6405281089 = 323739^2 + 80033^2 .

It is not an unprimeable number, because it can be changed into a prime (111212221213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13862851 + ... + 13870870.

Almost surely, 2^111212221210 is an apocalyptic number.

111212221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111212221210 is a deficient number, since it is larger than the sum of its proper divisors (89468991182).

111212221210 is a wasteful number, since it uses less digits than its factorization.

111212221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27734129.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111212221210 its reverse (12122212111), we get a palindrome (123334433321).

Subtracting from 111212221210 its reverse (12122212111), we obtain a palindrome (99090009099).

It can be divided in two parts, 1 and 11212221210, that added together give a palindrome (11212221211).

The spelling of 111212221210 in words is "one hundred eleven billion, two hundred twelve million, two hundred twenty-one thousand, two hundred ten".