21200220102002 has 16 divisors (see below), whose sum is σ = 33753262862520. Its totient is φ = 9952181557248.

The previous prime is 21200220101971. The next prime is 21200220102011. The reversal of 21200220102002 is 20020102200212.

It can be written as a sum of positive squares in 4 ways, for example, as 19245058312561 + 1955161789441 = 4386919^2 + 1398271^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 762254903 + ... + 762282714.

Almost surely, 2^{21200220102002} is an apocalyptic number.

21200220102002 is a deficient number, since it is larger than the sum of its proper divisors (12553042760518).

21200220102002 is a wasteful number, since it uses less digits than its factorization.

21200220102002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524538045.

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

Adding to 21200220102002 its reverse (20020102200212), we get a palindrome (41220322302214).

The spelling of 21200220102002 in words is "twenty-one trillion, two hundred billion, two hundred twenty million, one hundred two thousand, two".