10231311221 has 2 divisors, whose sum is σ = 10231311222. Its totient is φ = 10231311220.

The previous prime is 10231311203. The next prime is 10231311247. The reversal of 10231311221 is 12211313201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9946072900 + 285238321 = 99730^2 + 16889^2 .

It is a cyclic number.

It is not a de Polignac number, because 10231311221 - 2²² = 10227116917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10231311221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10231311271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5115655610 + 5115655611.

It is an arithmetic number, because the mean of its divisors is an integer number (5115655611).

Almost surely, 2^10231311221 is an apocalyptic number.

It is an amenable number.

10231311221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10231311221 is an equidigital number, since it uses as much as digits as its factorization.

10231311221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 10231311221 its reverse (12211313201), we get a palindrome (22442624422).

The spelling of 10231311221 in words is "ten billion, two hundred thirty-one million, three hundred eleven thousand, two hundred twenty-one".