21002112002002 has 16 divisors (see below), whose sum is σ = 31518948902112. Its totient is φ = 10495796785600.

The previous prime is 21002112001987. The next prime is 21002112002033. The reversal of 21002112002002 is 20020021120012.

It is a happy number.

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, 39188733 + ... + 39721039.

It is an arithmetic number, because the mean of its divisors is an integer number (1969934306382).

Almost surely, 2^{21002112002002} is an apocalyptic number.

21002112002002 is a deficient number, since it is larger than the sum of its proper divisors (10516836900110).

21002112002002 is a wasteful number, since it uses less digits than its factorization.

21002112002002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542153.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21002112002002 its reverse (20020021120012), we get a palindrome (41022133122014).

The spelling of 21002112002002 in words is "twenty-one trillion, two billion, one hundred twelve million, two thousand, two".