11001220020001 has 2 divisors, whose sum is σ = 11001220020002. Its totient is φ = 11001220020000.

The previous prime is 11001220019921. The next prime is 11001220020013. The reversal of 11001220020001 is 10002002210011.

11001220020001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10593716530401 + 407503489600 = 3254799^2 + 638360^2 .

It is a cyclic number.

It is not a de Polignac number, because 11001220020001 - 2⁴³ = 2205126997793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11001220020001.

It is not a weakly prime, because it can be changed into another prime (11001220020061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500610010000 + 5500610010001.

It is an arithmetic number, because the mean of its divisors is an integer number (5500610010001).

Almost surely, 2^{11001220020001} is an apocalyptic number.

It is an amenable number.

11001220020001 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001220020001 is an equidigital number, since it uses as much as digits as its factorization.

11001220020001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 11001220020001 its reverse (10002002210011), we get a palindrome (21003222230012).

The spelling of 11001220020001 in words is "eleven trillion, one billion, two hundred twenty million, twenty thousand, one".