21002201020002 has 8 divisors (see below), whose sum is σ = 42004402040016. Its totient is φ = 7000733673332.

The previous prime is 21002201020001. The next prime is 21002201020037. The reversal of 21002201020002 is 20002010220012.

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

21002201020002 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21002201020002.

It is not an unprimeable number, because it can be changed into a prime (21002201020001) 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, 1750183418328 + ... + 1750183418339.

It is an arithmetic number, because the mean of its divisors is an integer number (5250550255002).

Almost surely, 2^{21002201020002} is an apocalyptic number.

21002201020002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21002201020002 is a wasteful number, since it uses less digits than its factorization.

21002201020002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3500366836672.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21002201020002 its reverse (20002010220012), we get a palindrome (41004211240014).

The spelling of 21002201020002 in words is "twenty-one trillion, two billion, two hundred one million, twenty thousand, two".