12215301121 has 4 divisors (see below), whose sum is σ = 12285909972. Its totient is φ = 12144692272.

The previous prime is 12215301113. The next prime is 12215301157. The reversal of 12215301121 is 12110351221.

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 11510929521 + 704371600 = 107289^2 + 26540^2 .

It is a cyclic number.

It is not a de Polignac number, because 12215301121 - 2³ = 12215301113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12215301521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35304166 + ... + 35304511.

It is an arithmetic number, because the mean of its divisors is an integer number (3071477493).

Almost surely, 2^12215301121 is an apocalyptic number.

It is an amenable number.

12215301121 is a deficient number, since it is larger than the sum of its proper divisors (70608851).

12215301121 is an equidigital number, since it uses as much as digits as its factorization.

12215301121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70608850.

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 12215301121 its reverse (12110351221), we get a palindrome (24325652342).

The spelling of 12215301121 in words is "twelve billion, two hundred fifteen million, three hundred one thousand, one hundred twenty-one".