2102110123 has 4 divisors (see below), whose sum is σ = 2121756120. Its totient is φ = 2082464128.

The previous prime is 2102110121. The next prime is 2102110159. The reversal of 2102110123 is 3210112012.

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 2102110123 - 2¹ = 2102110121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2102110121) 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, 9822838 + ... + 9823051.

It is an arithmetic number, because the mean of its divisors is an integer number (530439030).

Almost surely, 2^2102110123 is an apocalyptic number.

2102110123 is a deficient number, since it is larger than the sum of its proper divisors (19645997).

2102110123 is a wasteful number, since it uses less digits than its factorization.

2102110123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19645996.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2102110123 is about 45848.7744983440. The cubic root of 2102110123 is about 1281.0079387948.

Adding to 2102110123 its reverse (3210112012), we get a palindrome (5312222135).

It can be divided in two parts, 2102 and 110123, that added together give a square (112225 = 335²).

The spelling of 2102110123 in words is "two billion, one hundred two million, one hundred ten thousand, one hundred twenty-three".