22222000221 has 16 divisors (see below), whose sum is σ = 31195491840. Its totient is φ = 14031923760.

The previous prime is 22222000127. The next prime is 22222000223. The reversal of 22222000221 is 12200022222.

It is not a de Polignac number, because 22222000221 - 2³¹ = 20074516573 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22222000221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222000223) 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, 241536 + ... + 320598.

It is an arithmetic number, because the mean of its divisors is an integer number (1949718240).

Almost surely, 2^22222000221 is an apocalyptic number.

It is an amenable number.

22222000221 is a deficient number, since it is larger than the sum of its proper divisors (8973491619).

22222000221 is a wasteful number, since it uses less digits than its factorization.

22222000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84016.

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 22222000221 its reverse (12200022222), we get a palindrome (34422022443).

The spelling of 22222000221 in words is "twenty-two billion, two hundred twenty-two million, two hundred twenty-one", and thus it is an aban number.