2121112023 has 4 divisors (see below), whose sum is σ = 2828149368. Its totient is φ = 1414074680.

The previous prime is 2121112013. The next prime is 2121112027. The reversal of 2121112023 is 3202111212.

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 2121112023 - 2⁶ = 2121111959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121111993 and 2121112011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121112027) 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, 353518668 + ... + 353518673.

It is an arithmetic number, because the mean of its divisors is an integer number (707037342).

Almost surely, 2^2121112023 is an apocalyptic number.

2121112023 is a deficient number, since it is larger than the sum of its proper divisors (707037345).

2121112023 is an equidigital number, since it uses as much as digits as its factorization.

2121112023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707037344.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2121112023 is about 46055.5319478562. The cubic root of 2121112023 is about 1284.8562316508.

Adding to 2121112023 its reverse (3202111212), we get a palindrome (5323223235).

The spelling of 2121112023 in words is "two billion, one hundred twenty-one million, one hundred twelve thousand, twenty-three".