21202112002 has 16 divisors (see below), whose sum is σ = 32649910272. Its totient is φ = 10321170880.

The previous prime is 21202111999. The next prime is 21202112051. The reversal of 21202112002 is 20021120212.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 572503 + ... + 608410.

It is an arithmetic number, because the mean of its divisors is an integer number (2040619392).

Almost surely, 2^21202112002 is an apocalyptic number.

21202112002 is a deficient number, since it is larger than the sum of its proper divisors (11447798270).

21202112002 is a wasteful number, since it uses less digits than its factorization.

21202112002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181153.

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

Adding to 21202112002 its reverse (20021120212), we get a palindrome (41223232214).

The spelling of 21202112002 in words is "twenty-one billion, two hundred two million, one hundred twelve thousand, two".