2102423123 has 16 divisors (see below), whose sum is σ = 2254897920. Its totient is φ = 1955457504.

The previous prime is 2102423111. The next prime is 2102423137. The reversal of 2102423123 is 3213242012.

It is a cyclic number.

It is not a de Polignac number, because 2102423123 - 2¹⁰ = 2102422099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2102423095 and 2102423104.

It is not an unprimeable number, because it can be changed into a prime (2102423153) 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 15 ways as a sum of consecutive naturals, for example, 221840 + ... + 231122.

It is an arithmetic number, because the mean of its divisors is an integer number (140931120).

Almost surely, 2^2102423123 is an apocalyptic number.

2102423123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2102423123 is a deficient number, since it is larger than the sum of its proper divisors (152474797).

2102423123 is a wasteful number, since it uses less digits than its factorization.

2102423123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9578.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2102423123 is about 45852.1877667795. The cubic root of 2102423123 is about 1281.0715154808.

Adding to 2102423123 its reverse (3213242012), we get a palindrome (5315665135).

The spelling of 2102423123 in words is "two billion, one hundred two million, four hundred twenty-three thousand, one hundred twenty-three".