22442222121 has 16 divisors (see below), whose sum is σ = 34563423168. Its totient is φ = 12801267200.

The previous prime is 22442222081. The next prime is 22442222213. The reversal of 22442222121 is 12122224422.

It is a cyclic number.

It is not a de Polignac number, because 22442222121 - 2¹³ = 22442213929 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22442222091 and 22442222100.

It is not an unprimeable number, because it can be changed into a prime (22442222921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20001420 + ... + 20002541.

It is an arithmetic number, because the mean of its divisors is an integer number (2160213948).

Almost surely, 2^22442222121 is an apocalyptic number.

It is an amenable number.

22442222121 is a deficient number, since it is larger than the sum of its proper divisors (12121201047).

22442222121 is a wasteful number, since it uses less digits than its factorization.

22442222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40003992.

The product of its digits is 2048, while the sum is 24.

Adding to 22442222121 its reverse (12122224422), we get a palindrome (34564446543).

The spelling of 22442222121 in words is "twenty-two billion, four hundred forty-two million, two hundred twenty-two thousand, one hundred twenty-one".