11221543105345 has 4 divisors (see below), whose sum is σ = 13465851726420. Its totient is φ = 8977234484272.

The previous prime is 11221543105219. The next prime is 11221543105361. The reversal of 11221543105345 is 54350134512211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4240597051441 + 6980946053904 = 2059271^2 + 2642148^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221543105345 - 2¹³ = 11221543097153 is a prime.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1122154310530 + ... + 1122154310539.

It is an arithmetic number, because the mean of its divisors is an integer number (3366462931605).

Almost surely, 2^{11221543105345} is an apocalyptic number.

It is an amenable number.

11221543105345 is a deficient number, since it is larger than the sum of its proper divisors (2244308621075).

11221543105345 is an equidigital number, since it uses as much as digits as its factorization.

11221543105345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244308621074.

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 11221543105345 its reverse (54350134512211), we get a palindrome (65571677617556).

The spelling of 11221543105345 in words is "eleven trillion, two hundred twenty-one billion, five hundred forty-three million, one hundred five thousand, three hundred forty-five".