12213312231121 has 4 divisors (see below), whose sum is σ = 12224955046500. Its totient is φ = 12201669415744.

The previous prime is 12213312231091. The next prime is 12213312231143. The reversal of 12213312231121 is 12113221331221.

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 11480000886225 + 733311344896 = 3388215^2 + 856336^2 .

It is a cyclic number.

It is not a de Polignac number, because 12213312231121 - 2¹¹ = 12213312229073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12213312231151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5821406116 + ... + 5821408213.

It is an arithmetic number, because the mean of its divisors is an integer number (3056238761625).

Almost surely, 2^{12213312231121} is an apocalyptic number.

It is an amenable number.

12213312231121 is a deficient number, since it is larger than the sum of its proper divisors (11642815379).

12213312231121 is a wasteful number, since it uses less digits than its factorization.

12213312231121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11642815378.

The product of its digits is 864, while the sum is 25.

Adding to 12213312231121 its reverse (12113221331221), we get a palindrome (24326533562342).

The spelling of 12213312231121 in words is "twelve trillion, two hundred thirteen billion, three hundred twelve million, two hundred thirty-one thousand, one hundred twenty-one".