12000012022021 has 4 divisors (see below), whose sum is σ = 12000021734700. Its totient is φ = 12000002309344.

The previous prime is 12000012022007. The next prime is 12000012022043. The reversal of 12000012022021 is 12022021000021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6950531140996 + 5049480881025 = 2636386^2 + 2247105^2 .

It is a cyclic number.

It is not a de Polignac number, because 12000012022021 - 2¹⁵ = 12000011989253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12000012021992 and 12000012022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000012022081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2677126 + ... + 5582743.

It is an arithmetic number, because the mean of its divisors is an integer number (3000005433675).

Almost surely, 2^{12000012022021} is an apocalyptic number.

It is an amenable number.

12000012022021 is a deficient number, since it is larger than the sum of its proper divisors (9712679).

12000012022021 is an equidigital number, since it uses as much as digits as its factorization.

12000012022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9712678.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12000012022021 its reverse (12022021000021), we get a palindrome (24022033022042).

The spelling of 12000012022021 in words is "twelve trillion, twelve million, twenty-two thousand, twenty-one".