12100002021 has 24 divisors (see below), whose sum is σ = 18750120480. Its totient is φ = 7788502512.

The previous prime is 12100002011. The next prime is 12100002121. The reversal of 12100002021 is 12020000121.

12100002021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12100002021 - 2²¹ = 12097904869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 12100001994 and 12100002012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100002011) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 851475 + ... + 865568.

It is an arithmetic number, because the mean of its divisors is an integer number (781255020).

Almost surely, 2^12100002021 is an apocalyptic number.

It is an amenable number.

12100002021 is a deficient number, since it is larger than the sum of its proper divisors (6650118459).

12100002021 is an equidigital number, since it uses as much as digits as its factorization.

12100002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717087 (or 1717075 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 12100002021 its reverse (12020000121), we get a palindrome (24120002142).

The spelling of 12100002021 in words is "twelve billion, one hundred million, two thousand, twenty-one".