21200221002102 has 32 divisors (see below), whose sum is σ = 43923957018624. Its totient is φ = 6814443652800.

The previous prime is 21200221002089. The next prime is 21200221002113. The reversal of 21200221002102 is 20120012200212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202758558 + ... + 202863089.

It is an arithmetic number, because the mean of its divisors is an integer number (1372623656832).

Almost surely, 2^{21200221002102} is an apocalyptic number.

21200221002102 is an abundant number, since it is smaller than the sum of its proper divisors (22723736016522).

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

21200221002102 is a wasteful number, since it uses less digits than its factorization.

21200221002102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405621964.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21200221002102 its reverse (20120012200212), we get a palindrome (41320233202314).

The spelling of 21200221002102 in words is "twenty-one trillion, two hundred billion, two hundred twenty-one million, two thousand, one hundred two".