2101231023 has 4 divisors (see below), whose sum is σ = 2801641368. Its totient is φ = 1400820680.

The previous prime is 2101230983. The next prime is 2101231049. The reversal of 2101231023 is 3201321012.

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 2101231023 - 2⁹ = 2101230511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2101230993 and 2101231011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101231123) 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, 350205168 + ... + 350205173.

It is an arithmetic number, because the mean of its divisors is an integer number (700410342).

Almost surely, 2^2101231023 is an apocalyptic number.

2101231023 is a deficient number, since it is larger than the sum of its proper divisors (700410345).

2101231023 is an equidigital number, since it uses as much as digits as its factorization.

2101231023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700410344.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2101231023 is about 45839.1865438295. The cubic root of 2101231023 is about 1280.8293418878.

Adding to 2101231023 its reverse (3201321012), we get a palindrome (5302552035).

The spelling of 2101231023 in words is "two billion, one hundred one million, two hundred thirty-one thousand, twenty-three".