2123512016 has 20 divisors (see below), whose sum is σ = 4214654724. Its totient is φ = 1035859200.

The previous prime is 2123511977. The next prime is 2123512019. The reversal of 2123512016 is 6102153212.

It can be written as a sum of positive squares in 2 ways, for example, as 948393616 + 1175118400 = 30796^2 + 34280^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2123511982 and 2123512000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123512019) 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, 1617875 + ... + 1619186.

Almost surely, 2^2123512016 is an apocalyptic number.

It is an amenable number.

2123512016 is a deficient number, since it is larger than the sum of its proper divisors (2091142708).

2123512016 is a wasteful number, since it uses less digits than its factorization.

2123512016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3237110 (or 3237104 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 2123512016 is about 46081.5800076343. The cubic root of 2123512016 is about 1285.3406448002.

Adding to 2123512016 its reverse (6102153212), we get a palindrome (8225665228).

The spelling of 2123512016 in words is "two billion, one hundred twenty-three million, five hundred twelve thousand, sixteen".