12221003503553 has 4 divisors (see below), whose sum is σ = 13161080696148. Its totient is φ = 11280926310960.

The previous prime is 12221003503517. The next prime is 12221003503573. The reversal of 12221003503553 is 35530530012221.

12221003503553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1910302686769 + 10310700816784 = 1382137^2 + 3211028^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221003503553 - 2¹² = 12221003499457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221003503573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470038596278 + ... + 470038596303.

It is an arithmetic number, because the mean of its divisors is an integer number (3290270174037).

Almost surely, 2^{12221003503553} is an apocalyptic number.

12221003503553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12221003503553 is a deficient number, since it is larger than the sum of its proper divisors (940077192595).

12221003503553 is an equidigital number, since it uses as much as digits as its factorization.

12221003503553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940077192594.

The product of its (nonzero) digits is 27000, while the sum is 32.

Adding to 12221003503553 its reverse (35530530012221), we get a palindrome (47751533515774).

The spelling of 12221003503553 in words is "twelve trillion, two hundred twenty-one billion, three million, five hundred three thousand, five hundred fifty-three".