12022000021 has 2 divisors, whose sum is σ = 12022000022. Its totient is φ = 12022000020.

The previous prime is 12021999943. The next prime is 12022000027. The reversal of 12022000021 is 12000022021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12006680625 + 15319396 = 109575^2 + 3914^2 .

It is a cyclic number.

It is not a de Polignac number, because 12022000021 - 2¹¹ = 12021997973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12021999971 and 12022000007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12022000027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6011000010 + 6011000011.

It is an arithmetic number, because the mean of its divisors is an integer number (6011000011).

Almost surely, 2^12022000021 is an apocalyptic number.

It is an amenable number.

12022000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12022000021 is an equidigital number, since it uses as much as digits as its factorization.

12022000021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 12022000021 its reverse (12000022021), we get a palindrome (24022022042).

The spelling of 12022000021 in words is "twelve billion, twenty-two million, twenty-one", and thus it is an aban number and an uban number.