2123511112 has 16 divisors (see below), whose sum is σ = 3984383340. Its totient is φ = 1061008896.

The previous prime is 2123511107. The next prime is 2123511119. The reversal of 2123511112 is 2111153212.

It can be written as a sum of positive squares in 2 ways, for example, as 1995051556 + 128459556 = 44666^2 + 11334^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2123511112.

It is not an unprimeable number, because it can be changed into a prime (2123511119) 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, 81153 + ... + 104080.

Almost surely, 2^2123511112 is an apocalyptic number.

It is an amenable number.

2123511112 is a deficient number, since it is larger than the sum of its proper divisors (1860872228).

2123511112 is a wasteful number, since it uses less digits than its factorization.

2123511112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186672 (or 186668 counting only the distinct ones).

The product of its digits is 120, while the sum is 19.

The square root of 2123511112 is about 46081.5701989418. The cubic root of 2123511112 is about 1285.3404624061.

Adding to 2123511112 its reverse (2111153212), we get a palindrome (4234664324).

The spelling of 2123511112 in words is "two billion, one hundred twenty-three million, five hundred eleven thousand, one hundred twelve".