2101323123 has 6 divisors (see below), whose sum is σ = 3035244524. Its totient is φ = 1400882076.

The previous prime is 2101323121. The next prime is 2101323149. The reversal of 2101323123 is 3213231012.

It is not a de Polignac number, because 2101323123 - 2¹ = 2101323121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101323096 and 2101323105.

It is not an unprimeable number, because it can be changed into a prime (2101323121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116740165 + ... + 116740182.

Almost surely, 2^2101323123 is an apocalyptic number.

2101323123 is a deficient number, since it is larger than the sum of its proper divisors (933921401).

2101323123 is a wasteful number, since it uses less digits than its factorization.

2101323123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233480353 (or 233480350 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2101323123 is about 45840.1911318005. The cubic root of 2101323123 is about 1280.8480551496.

Adding to 2101323123 its reverse (3213231012), we get a palindrome (5314554135).

The spelling of 2101323123 in words is "two billion, one hundred one million, three hundred twenty-three thousand, one hundred twenty-three".