221002105 has 16 divisors (see below), whose sum is σ = 269798400. Its totient is φ = 173759040.

The previous prime is 221002097. The next prime is 221002121. The reversal of 221002105 is 501200122.

It is not a de Polignac number, because 221002105 - 2³ = 221002097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93235 + ... + 95575.

It is an arithmetic number, because the mean of its divisors is an integer number (16862400).

Almost surely, 2^221002105 is an apocalyptic number.

It is an amenable number.

221002105 is a deficient number, since it is larger than the sum of its proper divisors (48796295).

221002105 is a wasteful number, since it uses less digits than its factorization.

221002105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2664.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 221002105 is about 14866.1395459615. The cubic root of 221002105 is about 604.5962791595.

Adding to 221002105 its reverse (501200122), we get a palindrome (722202227).

The spelling of 221002105 in words is "two hundred twenty-one million, two thousand, one hundred five".