2021423113 has 4 divisors (see below), whose sum is σ = 2024689360. Its totient is φ = 2018156868.

The previous prime is 2021423099. The next prime is 2021423119. The reversal of 2021423113 is 3113241202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3113241202 = 2 ⋅1556620601.

It is a cyclic number.

It is not a de Polignac number, because 2021423113 - 2¹⁷ = 2021292041 is a prime.

It is a super-2 number, since 2×2021423113² = 8172302803541221538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021423119) 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, 1632195 + ... + 1633432.

It is an arithmetic number, because the mean of its divisors is an integer number (506172340).

Almost surely, 2^2021423113 is an apocalyptic number.

It is an amenable number.

2021423113 is a deficient number, since it is larger than the sum of its proper divisors (3266247).

2021423113 is an equidigital number, since it uses as much as digits as its factorization.

2021423113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3266246.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2021423113 is about 44960.2392453599. The cubic root of 2021423113 is about 1264.4036544035.

Adding to 2021423113 its reverse (3113241202), we get a palindrome (5134664315).

The spelling of 2021423113 in words is "two billion, twenty-one million, four hundred twenty-three thousand, one hundred thirteen".