21002220210202 has 32 divisors (see below), whose sum is σ = 39277186758144. Its totient is φ = 8182619156400.

The previous prime is 21002220210173. The next prime is 21002220210247. The reversal of 21002220210202 is 20201202220012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22394577 + ... + 23313547.

It is an arithmetic number, because the mean of its divisors is an integer number (1227412086192).

Almost surely, 2^{21002220210202} is an apocalyptic number.

21002220210202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21002220210202 is a deficient number, since it is larger than the sum of its proper divisors (18274966547942).

21002220210202 is a wasteful number, since it uses less digits than its factorization.

21002220210202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067394.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21002220210202 its reverse (20201202220012), we get a palindrome (41203422430214).

The spelling of 21002220210202 in words is "twenty-one trillion, two billion, two hundred twenty million, two hundred ten thousand, two hundred two".