12021022001 has 2 divisors, whose sum is σ = 12021022002. Its totient is φ = 12021022000.

The previous prime is 12021021989. The next prime is 12021022003. The reversal of 12021022001 is 10022012021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11707023601 + 313998400 = 108199^2 + 17720^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021022001 - 2¹⁴ = 12021005617 is a prime.

Together with 12021022003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12021022003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010511000 + 6010511001.

It is an arithmetic number, because the mean of its divisors is an integer number (6010511001).

Almost surely, 2^12021022001 is an apocalyptic number.

It is an amenable number.

12021022001 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021022001 is an equidigital number, since it uses as much as digits as its factorization.

12021022001 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 11.

Adding to 12021022001 its reverse (10022012021), we get a palindrome (22043034022).

The spelling of 12021022001 in words is "twelve billion, twenty-one million, twenty-two thousand, one".