12102111111212 has 12 divisors (see below), whose sum is σ = 21476985916176. Its totient is φ = 5965829420880.

The previous prime is 12102111111203. The next prime is 12102111111229. The reversal of 12102111111212 is 21211111120121.

It is a super-2 number, since 2×12102111111212² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 21306533363 + ... + 21306533930.

It is an arithmetic number, because the mean of its divisors is an integer number (1789748826348).

Almost surely, 2^{12102111111212} is an apocalyptic number.

It is an amenable number.

12102111111212 is a deficient number, since it is larger than the sum of its proper divisors (9374874804964).

12102111111212 is a wasteful number, since it uses less digits than its factorization.

12102111111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42613067368 (or 42613067366 counting only the distinct ones).

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

Adding to 12102111111212 its reverse (21211111120121), we get a palindrome (33313222231333).

The spelling of 12102111111212 in words is "twelve trillion, one hundred two billion, one hundred eleven million, one hundred eleven thousand, two hundred twelve".