2021001010101 has 24 divisors (see below), whose sum is σ = 3093774276480. Its totient is φ = 1303871602680.

The previous prime is 2021001010079. The next prime is 2021001010169. The reversal of 2021001010101 is 1010101001202.

It is a happy number.

It is not a de Polignac number, because 2021001010101 - 2¹⁰ = 2021001009077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

2021001010101 is a modest number, since divided by 1010101 gives 20210 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021001010201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38918845 + ... + 38970738.

It is an arithmetic number, because the mean of its divisors is an integer number (128907261520).

Almost surely, 2^{2021001010101} is an apocalyptic number.

It is an amenable number.

2021001010101 is a deficient number, since it is larger than the sum of its proper divisors (1072773266379).

2021001010101 is an equidigital number, since it uses as much as digits as its factorization.

2021001010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77889654 (or 77889617 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 2021001010101 its reverse (1010101001202), we get a palindrome (3031102011303).

It can be divided in two parts, 202100 and 1010101, that added together give a square (1212201 = 1101²).

The spelling of 2021001010101 in words is "two trillion, twenty-one billion, one million, ten thousand, one hundred one".