2021002020101 has 2 divisors, whose sum is σ = 2021002020102. Its totient is φ = 2021002020100.

The previous prime is 2021002020083. The next prime is 2021002020109. The reversal of 2021002020101 is 1010202001202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1542380189476 + 478621830625 = 1241926^2 + 691825^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021002020101 - 2¹⁰ = 2021002019077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021002020109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010501010050 + 1010501010051.

It is an arithmetic number, because the mean of its divisors is an integer number (1010501010051).

Almost surely, 2^{2021002020101} is an apocalyptic number.

It is an amenable number.

2021002020101 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021002020101 is an equidigital number, since it uses as much as digits as its factorization.

2021002020101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2021002020101 its reverse (1010202001202), we get a palindrome (3031204021303).

The spelling of 2021002020101 in words is "two trillion, twenty-one billion, two million, twenty thousand, one hundred one".