12221566235353 has 4 divisors (see below), whose sum is σ = 12221916488500. Its totient is φ = 12221215982208.

The previous prime is 12221566235297. The next prime is 12221566235357. The reversal of 12221566235353 is 35353266512221.

It is a happy number.

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 4087137458889 + 8134428776464 = 2021667^2 + 2852092^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221566235353 - 2¹³ = 12221566227161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221566235357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175074228 + ... + 175144021.

It is an arithmetic number, because the mean of its divisors is an integer number (3055479122125).

Almost surely, 2^{12221566235353} is an apocalyptic number.

It is an amenable number.

12221566235353 is a deficient number, since it is larger than the sum of its proper divisors (350253147).

12221566235353 is an equidigital number, since it uses as much as digits as its factorization.

12221566235353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350253146.

The product of its digits is 1944000, while the sum is 46.

The spelling of 12221566235353 in words is "twelve trillion, two hundred twenty-one billion, five hundred sixty-six million, two hundred thirty-five thousand, three hundred fifty-three".