12121210110 has 16 divisors (see below), whose sum is σ = 29090904336. Its totient is φ = 3232322688.

The previous prime is 12121210109. The next prime is 12121210121. The reversal of 12121210110 is 1101212121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202020139 + ... + 202020198.

It is an arithmetic number, because the mean of its divisors is an integer number (1818181521).

Almost surely, 2^12121210110 is an apocalyptic number.

12121210110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121210110 is an abundant number, since it is smaller than the sum of its proper divisors (16969694226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12121210110 is a wasteful number, since it uses less digits than its factorization.

12121210110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404040347.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12121210110 its reverse (1101212121), we get a palindrome (13222422231).

The spelling of 12121210110 in words is "twelve billion, one hundred twenty-one million, two hundred ten thousand, one hundred ten".