12021020993 has 2 divisors, whose sum is σ = 12021020994. Its totient is φ = 12021020992.

The previous prime is 12021020971. The next prime is 12021021007. The reversal of 12021020993 is 39902012021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9191632129 + 2829388864 = 95873^2 + 53192^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021020993 - 2⁶ = 12021020929 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12021020293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010510496 + 6010510497.

It is an arithmetic number, because the mean of its divisors is an integer number (6010510497).

Almost surely, 2^12021020993 is an apocalyptic number.

It is an amenable number.

12021020993 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021020993 is an equidigital number, since it uses as much as digits as its factorization.

12021020993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 12021020993 in words is "twelve billion, twenty-one million, twenty thousand, nine hundred ninety-three".