1821007112 has 16 divisors (see below), whose sum is σ = 3416917500. Its totient is φ = 909829120.

The previous prime is 1821007109. The next prime is 1821007157. The reversal of 1821007112 is 2117001281.

It can be written as a sum of positive squares in 2 ways, for example, as 1797251236 + 23755876 = 42394^2 + 4874^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72737 + ... + 94512.

Almost surely, 2^1821007112 is an apocalyptic number.

It is an amenable number.

1821007112 is a deficient number, since it is larger than the sum of its proper divisors (1595910388).

1821007112 is a wasteful number, since it uses less digits than its factorization.

1821007112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168616 (or 168612 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 23.

The square root of 1821007112 is about 42673.2599176580. The cubic root of 1821007112 is about 1221.1543119560.

Adding to 1821007112 its reverse (2117001281), we get a palindrome (3938008393).

The spelling of 1821007112 in words is "one billion, eight hundred twenty-one million, seven thousand, one hundred twelve".