22221101222121 has 8 divisors (see below), whose sum is σ = 29722793542240. Its totient is φ = 14766738191712.

The previous prime is 22221101222113. The next prime is 22221101222129. The reversal of 22221101222121 is 12122210112222.

It is an interprime number because it is at equal distance from previous prime (22221101222113) and next prime (22221101222129).

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

It is not a de Polignac number, because 22221101222121 - 2³ = 22221101222113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22221101222129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11832321331 + ... + 11832323208.

It is an arithmetic number, because the mean of its divisors is an integer number (3715349192780).

Almost surely, 2^{22221101222121} is an apocalyptic number.

It is an amenable number.

22221101222121 is a deficient number, since it is larger than the sum of its proper divisors (7501692320119).

22221101222121 is a wasteful number, since it uses less digits than its factorization.

22221101222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23664644855.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22221101222121 its reverse (12122210112222), we get a palindrome (34343311334343).

The spelling of 22221101222121 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred one million, two hundred twenty-two thousand, one hundred twenty-one".