22221202121121 has 8 divisors (see below), whose sum is σ = 29646547273984. Its totient is φ = 14804995857840.

The previous prime is 22221202121113. The next prime is 22221202121123. The reversal of 22221202121121 is 12112120212222.

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

It is not a de Polignac number, because 22221202121121 - 2³ = 22221202121113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22221202121123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2284716721 + ... + 2284726446.

It is an arithmetic number, because the mean of its divisors is an integer number (3705818409248).

Almost surely, 2^{22221202121121} is an apocalyptic number.

It is an amenable number.

22221202121121 is a deficient number, since it is larger than the sum of its proper divisors (7425345152863).

22221202121121 is a wasteful number, since it uses less digits than its factorization.

22221202121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4569444791.

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

Adding to 22221202121121 its reverse (12112120212222), we get a palindrome (34333322333343).

The spelling of 22221202121121 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred two million, one hundred twenty-one thousand, one hundred twenty-one".