2016124821 has 6 divisors (see below), whose sum is σ = 2912180310. Its totient is φ = 1344083208.

The previous prime is 2016124807. The next prime is 2016124829. The reversal of 2016124821 is 1284216102.

2016124821 is a `hidden beast` number, since 2 + 0 + 1 + 612 + 48 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2015022321 + 1102500 = 44889^2 + 1050^2 .

It is not a de Polignac number, because 2016124821 - 2²¹ = 2014027669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2016124829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 112006926 + ... + 112006943.

It is an arithmetic number, because the mean of its divisors is an integer number (485363385).

Almost surely, 2^2016124821 is an apocalyptic number.

It is an amenable number.

2016124821 is a deficient number, since it is larger than the sum of its proper divisors (896055489).

2016124821 is a wasteful number, since it uses less digits than its factorization.

2016124821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224013875 (or 224013872 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 2016124821 is about 44901.2786120841. The cubic root of 2016124821 is about 1263.2979908954.

The spelling of 2016124821 in words is "two billion, sixteen million, one hundred twenty-four thousand, eight hundred twenty-one".