12121112211100 has 18 divisors (see below), whose sum is σ = 26302813498304. Its totient is φ = 4848444884400.

The previous prime is 12121112211079. The next prime is 12121112211151. The reversal of 12121112211100 is 111221112121.

It is a super-2 number, since 2×12121112211100² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60605560956 + ... + 60605561155.

Almost surely, 2^{12121112211100} is an apocalyptic number.

12121112211100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121112211100 is an abundant number, since it is smaller than the sum of its proper divisors (14181701287204).

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

12121112211100 is a wasteful number, since it uses less digits than its factorization.

12121112211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121211122125 (or 121211122118 counting only the distinct ones).

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

Adding to 12121112211100 its reverse (111221112121), we get a palindrome (12232333323221).

The spelling of 12121112211100 in words is "twelve trillion, one hundred twenty-one billion, one hundred twelve million, two hundred eleven thousand, one hundred".