2021023 has 4 divisors (see below), whose sum is σ = 2031480. Its totient is φ = 2010568.

The previous prime is 2021017. The next prime is 2021029. The reversal of 2021023 is 3201202.

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

It is an interprime number because it is at equal distance from previous prime (2021017) and next prime (2021029).

It is a cyclic number.

It is not a de Polignac number, because 2021023 - 2⁹ = 2020511 is a prime.

It is a Duffinian number.

2021023 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021029) 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, 4933 + ... + 5326.

It is an arithmetic number, because the mean of its divisors is an integer number (507870).

2^2021023 is an apocalyptic number.

2021023 is a deficient number, since it is larger than the sum of its proper divisors (10457).

2021023 is a wasteful number, since it uses less digits than its factorization.

2021023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10456.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 2021023 is about 1421.6268849456. The cubic root of 2021023 is about 126.4320225107.

Adding to 2021023 its reverse (3201202), we get a palindrome (5222225).

It can be divided in two parts, 202 and 1023, that added together give a triangular number (1225 = T₄₉).

The spelling of 2021023 in words is "two million, twenty-one thousand, twenty-three".