3121186489321 has 2 divisors, whose sum is σ = 3121186489322. Its totient is φ = 3121186489320.

The previous prime is 3121186489313. The next prime is 3121186489357. The reversal of 3121186489321 is 1239846811213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2220281783721 + 900904705600 = 1490061^2 + 949160^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121186489321 - 2³ = 3121186489313 is a prime.

It is a super-2 number, since 2×3121186489321² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3121186489121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560593244660 + 1560593244661.

It is an arithmetic number, because the mean of its divisors is an integer number (1560593244661).

Almost surely, 2^{3121186489321} is an apocalyptic number.

It is an amenable number.

3121186489321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121186489321 is an equidigital number, since it uses as much as digits as its factorization.

3121186489321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 49.

The spelling of 3121186489321 in words is "three trillion, one hundred twenty-one billion, one hundred eighty-six million, four hundred eighty-nine thousand, three hundred twenty-one".