21200514021 has 40 divisors (see below), whose sum is σ = 31956777600. Its totient is φ = 14006107872.

The previous prime is 21200514007. The next prime is 21200514067. The reversal of 21200514021 is 12041500212.

21200514021 is a `hidden beast` number, since 212 + 0 + 0 + 51 + 402 + 1 = 666.

It is not a de Polignac number, because 21200514021 - 2¹⁰ = 21200512997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21200513985 and 21200514003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200514721) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5875800 + ... + 5879406.

It is an arithmetic number, because the mean of its divisors is an integer number (798919440).

Almost surely, 2^21200514021 is an apocalyptic number.

It is an amenable number.

21200514021 is a deficient number, since it is larger than the sum of its proper divisors (10756263579).

21200514021 is a wasteful number, since it uses less digits than its factorization.

21200514021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4255 (or 4246 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The spelling of 21200514021 in words is "twenty-one billion, two hundred million, five hundred fourteen thousand, twenty-one".