21002220200012 has 6 divisors (see below), whose sum is σ = 36753885350028. Its totient is φ = 10501110100004.

The previous prime is 21002220199997. The next prime is 21002220200029. The reversal of 21002220200012 is 21000202220012.

It is a self number, because there is not a number n which added to its sum of digits gives 21002220200012.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2625277524998 + ... + 2625277525005.

It is an arithmetic number, because the mean of its divisors is an integer number (6125647558338).

Almost surely, 2^{21002220200012} is an apocalyptic number.

It is an amenable number.

21002220200012 is a deficient number, since it is larger than the sum of its proper divisors (15751665150016).

21002220200012 is a wasteful number, since it uses less digits than its factorization.

21002220200012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5250555050007 (or 5250555050005 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21002220200012 its reverse (21000202220012), we get a palindrome (42002422420024).

The spelling of 21002220200012 in words is "twenty-one trillion, two billion, two hundred twenty million, two hundred thousand, twelve".