2001220019993 has 2 divisors, whose sum is σ = 2001220019994. Its totient is φ = 2001220019992.

The previous prime is 2001220019983. The next prime is 2001220020077. The reversal of 2001220019993 is 3999100221002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1280330721289 + 720889298704 = 1131517^2 + 849052^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001220019993 - 2¹⁶ = 2001219954457 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001220019933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000610009996 + 1000610009997.

It is an arithmetic number, because the mean of its divisors is an integer number (1000610009997).

Almost surely, 2^{2001220019993} is an apocalyptic number.

It is an amenable number.

2001220019993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001220019993 is an equidigital number, since it uses as much as digits as its factorization.

2001220019993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 38.

The spelling of 2001220019993 in words is "two trillion, one billion, two hundred twenty million, nineteen thousand, nine hundred ninety-three".