2021313023 has 4 divisors (see below), whose sum is σ = 2023008528. Its totient is φ = 2019617520.

The previous prime is 2021313013. The next prime is 2021313061. The reversal of 2021313023 is 3203131202.

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

It is a cyclic number.

It is not a de Polignac number, because 2021313023 - 2¹⁴ = 2021296639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021312992 and 2021313010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021313013) 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, 845963 + ... + 848348.

It is an arithmetic number, because the mean of its divisors is an integer number (505752132).

Almost surely, 2^2021313023 is an apocalyptic number.

2021313023 is a deficient number, since it is larger than the sum of its proper divisors (1695505).

2021313023 is a wasteful number, since it uses less digits than its factorization.

2021313023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695504.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 2021313023 is about 44959.0149247067. The cubic root of 2021313023 is about 1264.3807001583.

Adding to 2021313023 its reverse (3203131202), we get a palindrome (5224444225).

The spelling of 2021313023 in words is "two billion, twenty-one million, three hundred thirteen thousand, twenty-three".