21100220020202 has 16 divisors (see below), whose sum is σ = 31947951467520. Its totient is φ = 10451154980448.

The previous prime is 21100220020193. The next prime is 21100220020237. The reversal of 21100220020202 is 20202002200112.

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, 62861243 + ... + 63196014.

It is an arithmetic number, because the mean of its divisors is an integer number (1996746966720).

Almost surely, 2^{21100220020202} is an apocalyptic number.

21100220020202 is a deficient number, since it is larger than the sum of its proper divisors (10847731447318).

21100220020202 is a wasteful number, since it uses less digits than its factorization.

21100220020202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126058045.

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

Adding to 21100220020202 its reverse (20202002200112), we get a palindrome (41302222220314).

The spelling of 21100220020202 in words is "twenty-one trillion, one hundred billion, two hundred twenty million, twenty thousand, two hundred two".