2102123112 has 32 divisors (see below), whose sum is σ = 5377526880. Its totient is φ = 684411840.

The previous prime is 2102123063. The next prime is 2102123147. The reversal of 2102123112 is 2113212012.

It is a junction number, because it is equal to n+sod(n) for n = 2102123091 and 2102123100.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1017439 + ... + 1019502.

It is an arithmetic number, because the mean of its divisors is an integer number (168047715).

Almost surely, 2^2102123112 is an apocalyptic number.

It is an amenable number.

2102123112 is an abundant number, since it is smaller than the sum of its proper divisors (3275403768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2102123112 is a wasteful number, since it uses less digits than its factorization.

2102123112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036993 (or 2036989 counting only the distinct ones).

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

The square root of 2102123112 is about 45848.9161485852. The cubic root of 2102123112 is about 1281.0105772512.

Adding to 2102123112 its reverse (2113212012), we get a palindrome (4215335124).

Subtracting 2102123112 from its reverse (2113212012), we obtain a square (11088900 = 3330²).

The spelling of 2102123112 in words is "two billion, one hundred two million, one hundred twenty-three thousand, one hundred twelve".