100001222 has 16 divisors (see below), whose sum is σ = 157051440. Its totient is φ = 47692512.

The previous prime is 100001219. The next prime is 100001227. The reversal of 100001222 is 222100001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5573 + ... + 15200.

It is an arithmetic number, because the mean of its divisors is an integer number (9815715).

Almost surely, 2^100001222 is an apocalyptic number.

100001222 is a deficient number, since it is larger than the sum of its proper divisors (57050218).

100001222 is a wasteful number, since it uses less digits than its factorization.

100001222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20887.

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

The square root of 100001222 is about 10000.0610998133. The cubic root of 100001222 is about 464.1607740274.

Adding to 100001222 its reverse (222100001), we get a palindrome (322101223).

It can be divided in two parts, 100001 and 222, that multiplied together give a palindrome (22200222).

The spelling of 100001222 in words is "one hundred million, one thousand, two hundred twenty-two".