2001220221043 has 2 divisors, whose sum is σ = 2001220221044. Its totient is φ = 2001220221042.

The previous prime is 2001220221019. The next prime is 2001220221059. The reversal of 2001220221043 is 3401220221002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2001220221043 - 2¹⁷ = 2001220089971 is a prime.

It is a super-2 number, since 2×2001220221043² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2001220221043.

It is not a weakly prime, because it can be changed into another prime (2001220221743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000610110521 + 1000610110522.

It is an arithmetic number, because the mean of its divisors is an integer number (1000610110522).

Almost surely, 2^{2001220221043} is an apocalyptic number.

2001220221043 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001220221043 is an equidigital number, since it uses as much as digits as its factorization.

2001220221043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 2001220221043 its reverse (3401220221002), we get a palindrome (5402440442045).

The spelling of 2001220221043 in words is "two trillion, one billion, two hundred twenty million, two hundred twenty-one thousand, forty-three".