121222001105 has 4 divisors (see below), whose sum is σ = 145466401332. Its totient is φ = 96977600880.

The previous prime is 121222001081. The next prime is 121222001143. The reversal of 121222001105 is 501100222121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91129119376 + 30092881729 = 301876^2 + 173473^2 .

It is not a de Polignac number, because 121222001105 - 2⁸ = 121222000849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 12122200106 + ... + 12122200115.

It is an arithmetic number, because the mean of its divisors is an integer number (36366600333).

Almost surely, 2^121222001105 is an apocalyptic number.

It is an amenable number.

121222001105 is a deficient number, since it is larger than the sum of its proper divisors (24244400227).

121222001105 is an equidigital number, since it uses as much as digits as its factorization.

121222001105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24244400226.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 121222001105 its reverse (501100222121), we get a palindrome (622322223226).

The spelling of 121222001105 in words is "one hundred twenty-one billion, two hundred twenty-two million, one thousand, one hundred five".