221010210021210 has 16 divisors (see below), whose sum is σ = 530424504050976. Its totient is φ = 58936056005648.

The previous prime is 221010210021193. The next prime is 221010210021247. The reversal of 221010210021210 is 12120012010122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221010210021210.

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, 3683503500324 + ... + 3683503500383.

It is an arithmetic number, because the mean of its divisors is an integer number (33151531503186).

Almost surely, 2^{221010210021210} is an apocalyptic number.

221010210021210 is an abundant number, since it is smaller than the sum of its proper divisors (309414294029766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221010210021210 is a wasteful number, since it uses less digits than its factorization.

221010210021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7367007000717.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221010210021210 its reverse (12120012010122), we get a palindrome (233130222031332).

The spelling of 221010210021210 in words is "two hundred twenty-one trillion, ten billion, two hundred ten million, twenty-one thousand, two hundred ten".