3121321311121 has 8 divisors (see below), whose sum is σ = 3477334087080. Its totient is φ = 2781867268992.

The previous prime is 3121321311089. The next prime is 3121321311181. The reversal of 3121321311121 is 1211131231213.

It can be written as a sum of positive squares in 4 ways, for example, as 273027150400 + 2848294160721 = 522520^2 + 1687689^2 .

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 3121321311121 - 2⁵ = 3121321311089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121321311092 and 3121321311101.

It is not an unprimeable number, because it can be changed into a prime (3121321311181) 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, 4139683060 + ... + 4139683813.

It is an arithmetic number, because the mean of its divisors is an integer number (434666760885).

Almost surely, 2^{3121321311121} is an apocalyptic number.

It is an amenable number.

3121321311121 is a deficient number, since it is larger than the sum of its proper divisors (356012775959).

3121321311121 is a wasteful number, since it uses less digits than its factorization.

3121321311121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8279366915.

The product of its digits is 216, while the sum is 22.

Adding to 3121321311121 its reverse (1211131231213), we get a palindrome (4332452542334).

The spelling of 3121321311121 in words is "three trillion, one hundred twenty-one billion, three hundred twenty-one million, three hundred eleven thousand, one hundred twenty-one".