12000021012021 has 16 divisors (see below), whose sum is σ = 18543292028928. Its totient is φ = 6760575217200.

The previous prime is 12000021012011. The next prime is 12000021012053. The reversal of 12000021012021 is 12021012000021.

It is not a de Polignac number, because 12000021012021 - 2⁹ = 12000021011509 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12000021011988 and 12000021012006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000021012011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4024150425 + ... + 4024153406.

It is an arithmetic number, because the mean of its divisors is an integer number (1158955751808).

Almost surely, 2^{12000021012021} is an apocalyptic number.

It is an amenable number.

12000021012021 is a deficient number, since it is larger than the sum of its proper divisors (6543271016907).

12000021012021 is an equidigital number, since it uses as much as digits as its factorization.

12000021012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8048303912.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12000021012021 its reverse (12021012000021), we get a palindrome (24021033012042).

The spelling of 12000021012021 in words is "twelve trillion, twenty-one million, twelve thousand, twenty-one".