12000100021 has 12 divisors (see below), whose sum is σ = 14850505632. Its totient is φ = 9494583696.

The previous prime is 12000100001. The next prime is 12000100033.

12000100021 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12000100021 - 2⁵ = 12000099989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12000099977 and 12000100013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000100001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5070711 + ... + 5073076.

It is an arithmetic number, because the mean of its divisors is an integer number (1237542136).

Almost surely, 2^12000100021 is an apocalyptic number.

It is an amenable number.

12000100021 is a deficient number, since it is larger than the sum of its proper divisors (2850405611).

12000100021 is a wasteful number, since it uses less digits than its factorization.

12000100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10143820 (or 10143807 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The spelling of 12000100021 in words is "twelve billion, one hundred thousand, twenty-one".