13033231230221 has 2 divisors, whose sum is σ = 13033231230222. Its totient is φ = 13033231230220.

The previous prime is 13033231230199. The next prime is 13033231230259. The reversal of 13033231230221 is 12203213233031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12637100716900 + 396130513321 = 3554870^2 + 629389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13033231230221 is a prime.

It is a super-2 number, since 2×13033231230221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13033231230281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6516615615110 + 6516615615111.

It is an arithmetic number, because the mean of its divisors is an integer number (6516615615111).

Almost surely, 2^{13033231230221} is an apocalyptic number.

It is an amenable number.

13033231230221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13033231230221 is an equidigital number, since it uses as much as digits as its factorization.

13033231230221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 13033231230221 its reverse (12203213233031), we get a palindrome (25236444463252).

The spelling of 13033231230221 in words is "thirteen trillion, thirty-three billion, two hundred thirty-one million, two hundred thirty thousand, two hundred twenty-one".