12021209971 has 2 divisors, whose sum is σ = 12021209972. Its totient is φ = 12021209970.

The previous prime is 12021209951. The next prime is 12021210011. The reversal of 12021209971 is 17990212021.

It is a happy number.

12021209971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12021209971 - 2⁷ = 12021209843 is a prime.

It is not a weakly prime, because it can be changed into another prime (12021209951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010604985 + 6010604986.

It is an arithmetic number, because the mean of its divisors is an integer number (6010604986).

Almost surely, 2^12021209971 is an apocalyptic number.

12021209971 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021209971 is an equidigital number, since it uses as much as digits as its factorization.

12021209971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 34.

The spelling of 12021209971 in words is "twelve billion, twenty-one million, two hundred nine thousand, nine hundred seventy-one".