12121121110 has 32 divisors (see below), whose sum is σ = 24994448640. Its totient is φ = 4145884512.

The previous prime is 12121121087. The next prime is 12121121113. The reversal of 12121121110 is 1112112121.

It is a happy number.

12121121110 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121121113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177304 + ... + 235963.

It is an arithmetic number, because the mean of its divisors is an integer number (781076520).

Almost surely, 2^12121121110 is an apocalyptic number.

12121121110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121121110 is an abundant number, since it is smaller than the sum of its proper divisors (12873327530).

12121121110 is a wasteful number, since it uses less digits than its factorization.

12121121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413700.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12121121110 its reverse (1112112121), we get a palindrome (13233233231).

The spelling of 12121121110 in words is "twelve billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred ten".