3122031312121 has 4 divisors (see below), whose sum is σ = 3305680212852. Its totient is φ = 2938382411392.

The previous prime is 3122031312107. The next prime is 3122031312137. The reversal of 3122031312121 is 1212131302213.

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 1537441284096 + 1584590028025 = 1239936^2 + 1258805^2 .

It is a cyclic number.

It is not a de Polignac number, because 3122031312121 - 2¹⁹ = 3122030787833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3122031312092 and 3122031312101.

It is not an unprimeable number, because it can be changed into a prime (3122031112121) 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, 91824450340 + ... + 91824450373.

It is an arithmetic number, because the mean of its divisors is an integer number (826420053213).

Almost surely, 2^{3122031312121} is an apocalyptic number.

It is an amenable number.

3122031312121 is a deficient number, since it is larger than the sum of its proper divisors (183648900731).

3122031312121 is a wasteful number, since it uses less digits than its factorization.

3122031312121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183648900730.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 3122031312121 its reverse (1212131302213), we get a palindrome (4334162614334).

The spelling of 3122031312121 in words is "three trillion, one hundred twenty-two billion, thirty-one million, three hundred twelve thousand, one hundred twenty-one".