12120211111100 has 36 divisors (see below), whose sum is σ = 26693408246904. Its totient is φ = 4775724972480.

The previous prime is 12120211111091. The next prime is 12120211111117. The reversal of 12120211111100 is 111111202121.

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 11 ways as a sum of consecutive naturals, for example, 904486667 + ... + 904500066.

It is an arithmetic number, because the mean of its divisors is an integer number (741483562414).

Almost surely, 2^{12120211111100} is an apocalyptic number.

12120211111100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12120211111100 is an abundant number, since it is smaller than the sum of its proper divisors (14573197135804).

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

12120211111100 is a wasteful number, since it uses less digits than its factorization.

12120211111100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808986814 (or 1808986807 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 12120211111100 its reverse (111111202121), we get a palindrome (12231322313221).

The spelling of 12120211111100 in words is "twelve trillion, one hundred twenty billion, two hundred eleven million, one hundred eleven thousand, one hundred".