21211210002 has 32 divisors (see below), whose sum is σ = 43658658432. Its totient is φ = 6865150464.

The previous prime is 21211209997. The next prime is 21211210021. The reversal of 21211210002 is 20001211212.

It is a self number, because there is not a number n which added to its sum of digits gives 21211210002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10018 + ... + 206210.

It is an arithmetic number, because the mean of its divisors is an integer number (1364333076).

Almost surely, 2^21211210002 is an apocalyptic number.

21211210002 is an abundant number, since it is smaller than the sum of its proper divisors (22447448430).

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

21211210002 is a wasteful number, since it uses less digits than its factorization.

21211210002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196722.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21211210002 its reverse (20001211212), we get a palindrome (41212421214).

The spelling of 21211210002 in words is "twenty-one billion, two hundred eleven million, two hundred ten thousand, two".