2021110023 has 4 divisors (see below), whose sum is σ = 2694813368. Its totient is φ = 1347406680.

The previous prime is 2021110001. The next prime is 2021110033. The reversal of 2021110023 is 3200111202.

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

It is not a de Polignac number, because 2021110023 - 2³⁰ = 947368199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021109990 and 2021110008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021110033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336851668 + ... + 336851673.

It is an arithmetic number, because the mean of its divisors is an integer number (673703342).

Almost surely, 2^2021110023 is an apocalyptic number.

2021110023 is a deficient number, since it is larger than the sum of its proper divisors (673703345).

2021110023 is an equidigital number, since it uses as much as digits as its factorization.

2021110023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673703344.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2021110023 is about 44956.7572562791. The cubic root of 2021110023 is about 1264.3383715874.

Adding to 2021110023 its reverse (3200111202), we get a palindrome (5221221225).

The spelling of 2021110023 in words is "two billion, twenty-one million, one hundred ten thousand, twenty-three".