10555243221 has 8 divisors (see below), whose sum is σ = 14373097344. Its totient is φ = 6887108960.

The previous prime is 10555243217. The next prime is 10555243297. The reversal of 10555243221 is 12234255501.

10555243221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10555243221 - 2² = 10555243217 is a prime.

It is a super-2 number, since 2×10555243221² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10555243211) 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 in 7 ways as a sum of consecutive naturals, for example, 37429800 + ... + 37430081.

It is an arithmetic number, because the mean of its divisors is an integer number (1796637168).

Almost surely, 2^10555243221 is an apocalyptic number.

It is an amenable number.

10555243221 is a deficient number, since it is larger than the sum of its proper divisors (3817854123).

10555243221 is an equidigital number, since it uses as much as digits as its factorization.

10555243221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74859931.

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 10555243221 its reverse (12234255501), we get a palindrome (22789498722).

The spelling of 10555243221 in words is "ten billion, five hundred fifty-five million, two hundred forty-three thousand, two hundred twenty-one".