21200102202102 has 32 divisors (see below), whose sum is σ = 43391861948160. Its totient is φ = 6903250734240.

The previous prime is 21200102202077. The next prime is 21200102202131. The reversal of 21200102202102 is 20120220100212.

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, 228235668 + ... + 228328535.

It is an arithmetic number, because the mean of its divisors is an integer number (1355995685880).

Almost surely, 2^{21200102202102} is an apocalyptic number.

21200102202102 is an abundant number, since it is smaller than the sum of its proper divisors (22191759746058).

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

21200102202102 is a wasteful number, since it uses less digits than its factorization.

21200102202102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456564388.

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

Adding to 21200102202102 its reverse (20120220100212), we get a palindrome (41320322302314).

The spelling of 21200102202102 in words is "twenty-one trillion, two hundred billion, one hundred two million, two hundred two thousand, one hundred two".