10543350231221 has 2 divisors, whose sum is σ = 10543350231222. Its totient is φ = 10543350231220.

The previous prime is 10543350231203. The next prime is 10543350231223. The reversal of 10543350231221 is 12213205334501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10497509280196 + 45840951025 = 3239986^2 + 214105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10543350231221 is a prime.

It is a super-2 number, since 2×10543350231221² (a number of 27 digits) contains 22 as substring.

Together with 10543350231223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10543350231223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5271675115610 + 5271675115611.

It is an arithmetic number, because the mean of its divisors is an integer number (5271675115611).

Almost surely, 2^{10543350231221} is an apocalyptic number.

It is an amenable number.

10543350231221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10543350231221 is an equidigital number, since it uses as much as digits as its factorization.

10543350231221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 10543350231221 its reverse (12213205334501), we get a palindrome (22756555565722).

The spelling of 10543350231221 in words is "ten trillion, five hundred forty-three billion, three hundred fifty million, two hundred thirty-one thousand, two hundred twenty-one".