2021103023 has 4 divisors (see below), whose sum is σ = 2022442128. Its totient is φ = 2019763920.

The previous prime is 2021103011. The next prime is 2021103043. The reversal of 2021103023 is 3203011202.

It is a happy number.

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 2021103023 - 2⁶ = 2021102959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021102989 and 2021103007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021103043) 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, 667286 + ... + 670307.

It is an arithmetic number, because the mean of its divisors is an integer number (505610532).

Almost surely, 2^2021103023 is an apocalyptic number.

2021103023 is a deficient number, since it is larger than the sum of its proper divisors (1339105).

2021103023 is a wasteful number, since it uses less digits than its factorization.

2021103023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339104.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2021103023 is about 44956.6794036214. The cubic root of 2021103023 is about 1264.3369119309.

Adding to 2021103023 its reverse (3203011202), we get a palindrome (5224114225).

The spelling of 2021103023 in words is "two billion, twenty-one million, one hundred three thousand, twenty-three".