100002221 has 8 divisors (see below), whose sum is σ = 110174688. Its totient is φ = 90010000.

The previous prime is 100002181. The next prime is 100002223. The reversal of 100002221 is 122200001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100002221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100002199 and 100002208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100002223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43895 + ... + 46116.

It is an arithmetic number, because the mean of its divisors is an integer number (13771836).

Almost surely, 2^100002221 is an apocalyptic number.

100002221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100002221 is a deficient number, since it is larger than the sum of its proper divisors (10172467).

100002221 is a wasteful number, since it uses less digits than its factorization.

100002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90123.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 100002221 is about 10000.1110493834. Note that the first 3 decimals coincide. The cubic root of 100002221 is about 464.1623196588.

Adding to 100002221 its reverse (122200001), we get a palindrome (222202222).

It can be divided in two parts, 10000 and 2221, that added together give a palindrome (12221).

The spelling of 100002221 in words is "one hundred million, two thousand, two hundred twenty-one".