2021020021013 has 16 divisors (see below), whose sum is σ = 2359381770240. Its totient is φ = 1695085087536.

The previous prime is 2021020021003. The next prime is 2021020021039. The reversal of 2021020021013 is 3101200201202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2021020021013 - 2⁴ = 2021020020997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021020021003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 903548 + ... + 2204186.

It is an arithmetic number, because the mean of its divisors is an integer number (147461360640).

Almost surely, 2^{2021020021013} is an apocalyptic number.

It is an amenable number.

2021020021013 is a deficient number, since it is larger than the sum of its proper divisors (338361749227).

2021020021013 is a wasteful number, since it uses less digits than its factorization.

2021020021013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305416.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 2021020021013 its reverse (3101200201202), we get a palindrome (5122220222215).

The spelling of 2021020021013 in words is "two trillion, twenty-one billion, twenty million, twenty-one thousand, thirteen".