21002020100002 has 8 divisors (see below), whose sum is σ = 31504225926096. Its totient is φ = 10500611457972.

The previous prime is 21002020099981. The next prime is 21002020100041. The reversal of 21002020100002 is 20000102020012.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199230148 + ... + 199335535.

It is an arithmetic number, because the mean of its divisors is an integer number (3938028240762).

Almost surely, 2^{21002020100002} is an apocalyptic number.

21002020100002 is a deficient number, since it is larger than the sum of its proper divisors (10502205826094).

21002020100002 is a wasteful number, since it uses less digits than its factorization.

21002020100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398592032.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21002020100002 its reverse (20000102020012), we get a palindrome (41002122120014).

The spelling of 21002020100002 in words is "twenty-one trillion, two billion, twenty million, one hundred thousand, two".