22121021101121 has 8 divisors (see below), whose sum is σ = 22369767437160. Its totient is φ = 21872279110528.

The previous prime is 22121021101097. The next prime is 22121021101129. The reversal of 22121021101121 is 12110112012122.

It can be written as a sum of positive squares in 4 ways, for example, as 782756020225 + 21338265080896 = 884735^2 + 4619336^2 .

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 22121021101121 - 2¹⁴ = 22121021084737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22121021101121.

It is not an unprimeable number, because it can be changed into a prime (22121021101129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9757235 + ... + 11808711.

It is an arithmetic number, because the mean of its divisors is an integer number (2796220929645).

Almost surely, 2^{22121021101121} is an apocalyptic number.

It is an amenable number.

22121021101121 is a deficient number, since it is larger than the sum of its proper divisors (248746336039).

22121021101121 is a wasteful number, since it uses less digits than its factorization.

22121021101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2172723.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 22121021101121 its reverse (12110112012122), we get a palindrome (34231133113243).

The spelling of 22121021101121 in words is "twenty-two trillion, one hundred twenty-one billion, twenty-one million, one hundred one thousand, one hundred twenty-one".