22102222121 has 8 divisors (see below), whose sum is σ = 26745546240. Its totient is φ = 17830363968.

The previous prime is 22102222091. The next prime is 22102222133. The reversal of 22102222121 is 12122220122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 22102222121 - 2³⁴ = 4922352937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 22102222121.

It is not an unprimeable number, because it can be changed into a prime (22102222141) 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, 92866361 + ... + 92866598.

It is an arithmetic number, because the mean of its divisors is an integer number (3343193280).

Almost surely, 2^22102222121 is an apocalyptic number.

It is an amenable number.

22102222121 is a deficient number, since it is larger than the sum of its proper divisors (4643324119).

22102222121 is a wasteful number, since it uses less digits than its factorization.

22102222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185732983.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22102222121 its reverse (12122220122), we get a palindrome (34224442243).

The spelling of 22102222121 in words is "twenty-two billion, one hundred two million, two hundred twenty-two thousand, one hundred twenty-one".