12100011111021 has 24 divisors (see below), whose sum is σ = 16711017148800. Its totient is φ = 7787504604544.

The previous prime is 12100011111011. The next prime is 12100011111029. The reversal of 12100011111021 is 12011111000121.

It is not a de Polignac number, because 12100011111021 - 2³⁸ = 11825133204077 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12100011110988 and 12100011111006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100011111029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19430905 + ... + 20043953.

It is an arithmetic number, because the mean of its divisors is an integer number (696292381200).

Almost surely, 2^{12100011111021} is an apocalyptic number.

It is an amenable number.

12100011111021 is a deficient number, since it is larger than the sum of its proper divisors (4611006037779).

12100011111021 is an equidigital number, since it uses as much as digits as its factorization.

12100011111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620933 (or 620904 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 12100011111021 its reverse (12011111000121), we get a palindrome (24111122111142).

The spelling of 12100011111021 in words is "twelve trillion, one hundred billion, eleven million, one hundred eleven thousand, twenty-one".