2121824872 has 16 divisors (see below), whose sum is σ = 3978979200. Its totient is φ = 1060763760.

The previous prime is 2121824849. The next prime is 2121824909. The reversal of 2121824872 is 2784281212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63279 + ... + 90817.

It is an arithmetic number, because the mean of its divisors is an integer number (248686200).

Almost surely, 2^2121824872 is an apocalyptic number.

It is an amenable number.

2121824872 is a deficient number, since it is larger than the sum of its proper divisors (1857154328).

2121824872 is a wasteful number, since it uses less digits than its factorization.

2121824872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37176 (or 37172 counting only the distinct ones).

The product of its digits is 28672, while the sum is 37.

The square root of 2121824872 is about 46063.2703137760. The cubic root of 2121824872 is about 1285.0001507971. Note that the first 3 decimals are identical.

The spelling of 2121824872 in words is "two billion, one hundred twenty-one million, eight hundred twenty-four thousand, eight hundred seventy-two".