2001220201073 has 2 divisors, whose sum is σ = 2001220201074. Its totient is φ = 2001220201072.

The previous prime is 2001220201007. The next prime is 2001220201091. The reversal of 2001220201073 is 3701020221002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1344873937969 + 656346263104 = 1159687^2 + 810152^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001220201073 - 2³⁰ = 2000146459249 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001220201373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000610100536 + 1000610100537.

It is an arithmetic number, because the mean of its divisors is an integer number (1000610100537).

Almost surely, 2^{2001220201073} is an apocalyptic number.

It is an amenable number.

2001220201073 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001220201073 is an equidigital number, since it uses as much as digits as its factorization.

2001220201073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 20.

Adding to 2001220201073 its reverse (3701020221002), we get a palindrome (5702240422075).

The spelling of 2001220201073 in words is "two trillion, one billion, two hundred twenty million, two hundred one thousand, seventy-three".