12111000021100 has 72 divisors (see below), whose sum is σ = 26390963870208. Its totient is φ = 4824114120000.

The previous prime is 12111000021089. The next prime is 12111000021121. The reversal of 12111000021100 is 112000011121.

It is a super-2 number, since 2×12111000021100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

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 23 ways as a sum of consecutive naturals, for example, 129645009 + ... + 129738391.

It is an arithmetic number, because the mean of its divisors is an integer number (366541164864).

Almost surely, 2^{12111000021100} is an apocalyptic number.

12111000021100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111000021100 is an abundant number, since it is smaller than the sum of its proper divisors (14279963849108).

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

12111000021100 is a wasteful number, since it uses less digits than its factorization.

12111000021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98815 (or 98808 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 12111000021100 its reverse (112000011121), we get a palindrome (12223000032221).

The spelling of 12111000021100 in words is "twelve trillion, one hundred eleven billion, twenty-one thousand, one hundred".