21210221102210 has 16 divisors (see below), whose sum is σ = 43632454838976. Its totient is φ = 7272075806448.

The previous prime is 21210221102207. The next prime is 21210221102261. The reversal of 21210221102210 is 1220112201212.

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 7 ways as a sum of consecutive naturals, for example, 151501579232 + ... + 151501579371.

It is an arithmetic number, because the mean of its divisors is an integer number (2727028427436).

Almost surely, 2^{21210221102210} is an apocalyptic number.

21210221102210 is an abundant number, since it is smaller than the sum of its proper divisors (22422233736766).

21210221102210 is a wasteful number, since it uses less digits than its factorization.

21210221102210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303003158617.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21210221102210 its reverse (1220112201212), we get a palindrome (22430333303422).

The spelling of 21210221102210 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-one million, one hundred two thousand, two hundred ten".