22100001 has 32 divisors (see below), whose sum is σ = 38016000. Its totient is φ = 11081280.

The previous prime is 22099999. The next prime is 22100041. The reversal of 22100001 is 10000122.

It is a happy number.

It is not a de Polignac number, because 22100001 - 2¹ = 22099999 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22100041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5050 + ... + 8348.

It is an arithmetic number, because the mean of its divisors is an integer number (1188000).

Almost surely, 2^22100001 is an apocalyptic number.

22100001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22100001 is a deficient number, since it is larger than the sum of its proper divisors (15915999).

22100001 is a wasteful number, since it uses less digits than its factorization.

22100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3349.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 22100001 is about 4701.0638157762. The cubic root of 22100001 is about 280.6278470717.

Adding to 22100001 its reverse (10000122), we get a palindrome (32100123).

It can be divided in two parts, 22 and 100001, that multiplied together give a palindrome (2200022).

The spelling of 22100001 in words is "twenty-two million, one hundred thousand, one".