121321105 has 4 divisors (see below), whose sum is σ = 145585332. Its totient is φ = 97056880.

The previous prime is 121321097. The next prime is 121321127. The reversal of 121321105 is 501123121.

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 25887744 + 95433361 = 5088^2 + 9769^2 .

It is not a de Polignac number, because 121321105 - 2³ = 121321097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12132106 + ... + 12132115.

It is an arithmetic number, because the mean of its divisors is an integer number (36396333).

Almost surely, 2^121321105 is an apocalyptic number.

It is an amenable number.

121321105 is a deficient number, since it is larger than the sum of its proper divisors (24264227).

121321105 is an equidigital number, since it uses as much as digits as its factorization.

121321105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24264226.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 121321105 is about 11014.5860112852. The cubic root of 121321105 is about 495.0458822212.

Adding to 121321105 its reverse (501123121), we get a palindrome (622444226).

The spelling of 121321105 in words is "one hundred twenty-one million, three hundred twenty-one thousand, one hundred five".