21570620000221 has 8 divisors (see below), whose sum is σ = 22842364279680. Its totient is φ = 20299196196288.

The previous prime is 21570620000207. The next prime is 21570620000239. The reversal of 21570620000221 is 12200002607512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21570620000221 - 2³⁷ = 21433181046749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21570620000221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21570620000521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79980291 + ... + 80249536.

It is an arithmetic number, because the mean of its divisors is an integer number (2855295534960).

Almost surely, 2^{21570620000221} is an apocalyptic number.

It is an amenable number.

21570620000221 is a deficient number, since it is larger than the sum of its proper divisors (1271744279459).

21570620000221 is a wasteful number, since it uses less digits than its factorization.

21570620000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160237763.

The product of its (nonzero) digits is 3360, while the sum is 28.

Adding to 21570620000221 its reverse (12200002607512), we get a palindrome (33770622607733).

The spelling of 21570620000221 in words is "twenty-one trillion, five hundred seventy billion, six hundred twenty million, two hundred twenty-one", and thus it is an aban number.