3121230020321 has 16 divisors (see below), whose sum is σ = 3585962907648. Its totient is φ = 2661209160000.

The previous prime is 3121230020287. The next prime is 3121230020347. The reversal of 3121230020321 is 1230200321213.

It is a cyclic number.

It is not a de Polignac number, because 3121230020321 - 2¹⁴ = 3121230003937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121230020293 and 3121230020302.

It is not an unprimeable number, because it can be changed into a prime (3121230020021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39403271 + ... + 39482403.

It is an arithmetic number, because the mean of its divisors is an integer number (224122681728).

Almost surely, 2^{3121230020321} is an apocalyptic number.

It is an amenable number.

3121230020321 is a deficient number, since it is larger than the sum of its proper divisors (464732887327).

3121230020321 is a wasteful number, since it uses less digits than its factorization.

3121230020321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108832.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 3121230020321 its reverse (1230200321213), we get a palindrome (4351430341534).

The spelling of 3121230020321 in words is "three trillion, one hundred twenty-one billion, two hundred thirty million, twenty thousand, three hundred twenty-one".