3121122203321 has 2 divisors, whose sum is σ = 3121122203322. Its totient is φ = 3121122203320.

The previous prime is 3121122203273. The next prime is 3121122203389. The reversal of 3121122203321 is 1233022211213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1575178113721 + 1545944089600 = 1255061^2 + 1243360^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121122203321 - 2¹⁸ = 3121121941177 is a prime.

It is not a weakly prime, because it can be changed into another prime (3121122203621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560561101660 + 1560561101661.

It is an arithmetic number, because the mean of its divisors is an integer number (1560561101661).

Almost surely, 2^{3121122203321} is an apocalyptic number.

It is an amenable number.

3121122203321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121122203321 is an equidigital number, since it uses as much as digits as its factorization.

3121122203321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 3121122203321 its reverse (1233022211213), we get a palindrome (4354144414534).

The spelling of 3121122203321 in words is "three trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred three thousand, three hundred twenty-one".