2021421023013 has 16 divisors (see below), whose sum is σ = 3080882161280. Its totient is φ = 1154864644416.

The previous prime is 2021421023009. The next prime is 2021421023033. The reversal of 2021421023013 is 3103201241202.

It is not a de Polignac number, because 2021421023013 - 2² = 2021421023009 is a prime.

It is a super-2 number, since 2×2021421023013² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021421023033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9605218 + ... + 9813411.

It is an arithmetic number, because the mean of its divisors is an integer number (192555135080).

Almost surely, 2^{2021421023013} is an apocalyptic number.

It is an amenable number.

2021421023013 is a deficient number, since it is larger than the sum of its proper divisors (1059461138267).

2021421023013 is a wasteful number, since it uses less digits than its factorization.

2021421023013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19423596.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 2021421023013 its reverse (3103201241202), we get a palindrome (5124622264215).

The spelling of 2021421023013 in words is "two trillion, twenty-one billion, four hundred twenty-one million, twenty-three thousand, thirteen".