21210102220202 has 16 divisors (see below), whose sum is σ = 36360520892352. Its totient is φ = 9089957394240.

The previous prime is 21210102220189. The next prime is 21210102220213. The reversal of 21210102220202 is 20202220101212.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5664623 + ... + 8631810.

It is an arithmetic number, because the mean of its divisors is an integer number (2272532555772).

Almost surely, 2^{21210102220202} is an apocalyptic number.

21210102220202 is a deficient number, since it is larger than the sum of its proper divisors (15150418672150).

21210102220202 is a wasteful number, since it uses less digits than its factorization.

21210102220202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14402413.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21210102220202 its reverse (20202220101212), we get a palindrome (41412322321414).

The spelling of 21210102220202 in words is "twenty-one trillion, two hundred ten billion, one hundred two million, two hundred twenty thousand, two hundred two".