2021043113 has 4 divisors (see below), whose sum is σ = 2139928020. Its totient is φ = 1902158208.

The previous prime is 2021043103. The next prime is 2021043131. The reversal of 2021043113 is 3113401202.

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 1140615529 + 880427584 = 33773^2 + 29672^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021043113 - 2¹⁴ = 2021026729 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 118884889 = 2021043113 / (2 + 0 + 2 + 1 + 0 + 4 + 3 + 1 + 1 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021043091 and 2021043100.

It is not an unprimeable number, because it can be changed into a prime (2021043103) 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, 59442428 + ... + 59442461.

It is an arithmetic number, because the mean of its divisors is an integer number (534982005).

Almost surely, 2^2021043113 is an apocalyptic number.

It is an amenable number.

2021043113 is a deficient number, since it is larger than the sum of its proper divisors (118884907).

2021043113 is a wasteful number, since it uses less digits than its factorization.

2021043113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118884906.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2021043113 is about 44956.0130905755. The cubic root of 2021043113 is about 1264.3244192191.

Adding to 2021043113 its reverse (3113401202), we get a palindrome (5134444315).

The spelling of 2021043113 in words is "two billion, twenty-one million, forty-three thousand, one hundred thirteen".