13031333321221 has 2 divisors, whose sum is σ = 13031333321222. Its totient is φ = 13031333321220.

The previous prime is 13031333321197. The next prime is 13031333321263. The reversal of 13031333321221 is 12212333313031.

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., 12993789996100 + 37543325121 = 3604690^2 + 193761^2 .

It is a cyclic number.

It is not a de Polignac number, because 13031333321221 - 2⁴¹ = 10832310065669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13031333321221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13031333331221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6515666660610 + 6515666660611.

It is an arithmetic number, because the mean of its divisors is an integer number (6515666660611).

Almost surely, 2^{13031333321221} is an apocalyptic number.

It is an amenable number.

13031333321221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13031333321221 is an equidigital number, since it uses as much as digits as its factorization.

13031333321221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 13031333321221 its reverse (12212333313031), we get a palindrome (25243666634252).

The spelling of 13031333321221 in words is "thirteen trillion, thirty-one billion, three hundred thirty-three million, three hundred twenty-one thousand, two hundred twenty-one".