21300200102221 has 4 divisors (see below), whose sum is σ = 21301552597500. Its totient is φ = 21298847606944.

The previous prime is 21300200102201. The next prime is 21300200102287. The reversal of 21300200102221 is 12220100200312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6713223998121 + 14586976104100 = 2590989^2 + 3819290^2 .

It is a cyclic number.

It is not a de Polignac number, because 21300200102221 - 2⁵ = 21300200102189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21300200102195 and 21300200102204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300200102201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 676224016 + ... + 676255513.

It is an arithmetic number, because the mean of its divisors is an integer number (5325388149375).

Almost surely, 2^{21300200102221} is an apocalyptic number.

It is an amenable number.

21300200102221 is a deficient number, since it is larger than the sum of its proper divisors (1352495279).

21300200102221 is a wasteful number, since it uses less digits than its factorization.

21300200102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352495278.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21300200102221 its reverse (12220100200312), we get a palindrome (33520300302533).

The spelling of 21300200102221 in words is "twenty-one trillion, three hundred billion, two hundred million, one hundred two thousand, two hundred twenty-one".