2020212101 has 4 divisors (see below), whose sum is σ = 2033079852. Its totient is φ = 2007344352.

The previous prime is 2020212083. The next prime is 2020212121. The reversal of 2020212101 is 1012120202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1541740225 + 478471876 = 39265^2 + 21874^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020212101 - 2⁶ = 2020212037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020212121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6433640 + ... + 6433953.

It is an arithmetic number, because the mean of its divisors is an integer number (508269963).

Almost surely, 2^2020212101 is an apocalyptic number.

It is an amenable number.

2020212101 is a deficient number, since it is larger than the sum of its proper divisors (12867751).

2020212101 is a wasteful number, since it uses less digits than its factorization.

2020212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12867750.

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

The square root of 2020212101 is about 44946.7696392077. The cubic root of 2020212101 is about 1264.1511072637.

Adding to 2020212101 its reverse (1012120202), we get a palindrome (3032332303).

The spelling of 2020212101 in words is "two billion, twenty million, two hundred twelve thousand, one hundred one".