12212121110 has 32 divisors (see below), whose sum is σ = 25128161280. Its totient is φ = 4185999072.

The previous prime is 12212121079. The next prime is 12212121143. The reversal of 12212121110 is 1112121221.

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

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 305927 + ... + 343533.

It is an arithmetic number, because the mean of its divisors is an integer number (785255040).

Almost surely, 2^12212121110 is an apocalyptic number.

12212121110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12212121110 is an abundant number, since it is smaller than the sum of its proper divisors (12916040170).

12212121110 is a wasteful number, since it uses less digits than its factorization.

12212121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42260.

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

Adding to 12212121110 its reverse (1112121221), we get a palindrome (13324242331).

It can be divided in two parts, 122121211 and 10, that added together give a palindrome (122121221).

The spelling of 12212121110 in words is "twelve billion, two hundred twelve million, one hundred twenty-one thousand, one hundred ten".