10111230321221 has 2 divisors, whose sum is σ = 10111230321222. Its totient is φ = 10111230321220.

The previous prime is 10111230321161. The next prime is 10111230321263. The reversal of 10111230321221 is 12212303211101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6565970632225 + 3545259688996 = 2562415^2 + 1882886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10111230321221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10111230321193 and 10111230321202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10111230321821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055615160610 + 5055615160611.

It is an arithmetic number, because the mean of its divisors is an integer number (5055615160611).

Almost surely, 2^{10111230321221} is an apocalyptic number.

It is an amenable number.

10111230321221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111230321221 is an equidigital number, since it uses as much as digits as its factorization.

10111230321221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 10111230321221 its reverse (12212303211101), we get a palindrome (22323533532322).

The spelling of 10111230321221 in words is "ten trillion, one hundred eleven billion, two hundred thirty million, three hundred twenty-one thousand, two hundred twenty-one".