21002010020002 has 16 divisors (see below), whose sum is σ = 34367061145824. Its totient is φ = 9546330508000.

The previous prime is 21002010019997. The next prime is 21002010020077. The reversal of 21002010020002 is 20002001020012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4261302 + ... + 7756462.

It is an arithmetic number, because the mean of its divisors is an integer number (2147941321614).

Almost surely, 2^{21002010020002} is an apocalyptic number.

21002010020002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21002010020002 is a deficient number, since it is larger than the sum of its proper divisors (13365051125822).

21002010020002 is a wasteful number, since it uses less digits than its factorization.

21002010020002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3768305.

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

Adding to 21002010020002 its reverse (20002001020012), we get a palindrome (41004011040014).

The spelling of 21002010020002 in words is "twenty-one trillion, two billion, ten million, twenty thousand, two".