2021021000101 has 2 divisors, whose sum is σ = 2021021000102. Its totient is φ = 2021021000100.

The previous prime is 2021020999967. The next prime is 2021021000107. The reversal of 2021021000101 is 1010001201202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1698708189025 + 322312811076 = 1303345^2 + 567726^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021021000101 - 2¹¹ = 2021020998053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021021000107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010510500050 + 1010510500051.

It is an arithmetic number, because the mean of its divisors is an integer number (1010510500051).

Almost surely, 2^{2021021000101} is an apocalyptic number.

It is an amenable number.

2021021000101 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021021000101 is an equidigital number, since it uses as much as digits as its factorization.

2021021000101 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2021021000101 its reverse (1010001201202), we get a palindrome (3031022201303).

The spelling of 2021021000101 in words is "two trillion, twenty-one billion, twenty-one million, one hundred one", and thus it is an aban number.