22221100121 has 8 divisors (see below), whose sum is σ = 24251016384. Its totient is φ = 20192819920.

The previous prime is 22221100117. The next prime is 22221100127. The reversal of 22221100121 is 12100112222.

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 22221100121 - 2² = 22221100117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22221100096 and 22221100105.

It is not an unprimeable number, because it can be changed into a prime (22221100127) 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, 380525 + ... + 435018.

It is an arithmetic number, because the mean of its divisors is an integer number (3031377048).

Almost surely, 2^22221100121 is an apocalyptic number.

It is an amenable number.

22221100121 is a deficient number, since it is larger than the sum of its proper divisors (2029916263).

22221100121 is a wasteful number, since it uses less digits than its factorization.

22221100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818031.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22221100121 its reverse (12100112222), we get a palindrome (34321212343).

The spelling of 22221100121 in words is "twenty-two billion, two hundred twenty-one million, one hundred thousand, one hundred twenty-one".