12121111221110 has 16 divisors (see below), whose sum is σ = 21938541638832. Its totient is φ = 4821657501600.

The previous prime is 12121111221083. The next prime is 12121111221187. The reversal of 12121111221110 is 1112211112121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3348371456 + ... + 3348375075.

It is an arithmetic number, because the mean of its divisors is an integer number (1371158852427).

Almost surely, 2^{12121111221110} is an apocalyptic number.

12121111221110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121111221110 is a deficient number, since it is larger than the sum of its proper divisors (9817430417722).

12121111221110 is a wasteful number, since it uses less digits than its factorization.

12121111221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6696746719.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 12121111221110 its reverse (1112211112121), we get a palindrome (13233322333231).

The spelling of 12121111221110 in words is "twelve trillion, one hundred twenty-one billion, one hundred eleven million, two hundred twenty-one thousand, one hundred ten".