10002100201221 has 4 divisors (see below), whose sum is σ = 13336133601632. Its totient is φ = 6668066800812.

The previous prime is 10002100201217. The next prime is 10002100201237. The reversal of 10002100201221 is 12210200120001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 10002100201221 - 2² = 10002100201217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10002100201197 and 10002100201206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10002100201241) 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, 1667016700201 + ... + 1667016700206.

It is an arithmetic number, because the mean of its divisors is an integer number (3334033400408).

Almost surely, 2^{10002100201221} is an apocalyptic number.

It is an amenable number.

10002100201221 is a deficient number, since it is larger than the sum of its proper divisors (3334033400411).

10002100201221 is an equidigital number, since it uses as much as digits as its factorization.

10002100201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3334033400410.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 10002100201221 its reverse (12210200120001), we get a palindrome (22212300321222).

The spelling of 10002100201221 in words is "ten trillion, two billion, one hundred million, two hundred one thousand, two hundred twenty-one".