111212100121210 has 32 divisors (see below), whose sum is σ = 218380973804352. Its totient is φ = 40440606286080.

The previous prime is 111212100121193. The next prime is 111212100121217. The reversal of 111212100121210 is 12121001212111.

It is not an unprimeable number, because it can be changed into a prime (111212100121217) 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, 28568914 + ... + 32227426.

It is an arithmetic number, because the mean of its divisors is an integer number (6824405431386).

Almost surely, 2^{111212100121210} is an apocalyptic number.

111212100121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111212100121210 is a deficient number, since it is larger than the sum of its proper divisors (107168873683142).

111212100121210 is a wasteful number, since it uses less digits than its factorization.

111212100121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3934878.

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

Adding to 111212100121210 its reverse (12121001212111), we get a palindrome (123333101333321).

It can be divided in two parts, 1 and 11212100121210, that added together give a palindrome (11212100121211).

The spelling of 111212100121210 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred million, one hundred twenty-one thousand, two hundred ten".