21002002012002 has 96 divisors (see below), whose sum is σ = 46274796876672. Its totient is φ = 6349764960000.

The previous prime is 21002002011989. The next prime is 21002002012067. The reversal of 21002002012002 is 20021020020012.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1039641502 + ... + 1039661702.

It is an arithmetic number, because the mean of its divisors is an integer number (482029134132).

Almost surely, 2^{21002002012002} is an apocalyptic number.

21002002012002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21002002012002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23137398438336).

21002002012002 is an abundant number, since it is smaller than the sum of its proper divisors (25272794864670).

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

21002002012002 is a wasteful number, since it uses less digits than its factorization.

21002002012002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23416 (or 23405 counting only the distinct ones).

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

Adding to 21002002012002 its reverse (20021020020012), we get a palindrome (41023022032014).

The spelling of 21002002012002 in words is "twenty-one trillion, two billion, two million, twelve thousand, two".