1305441112221 has 56 divisors (see below), whose sum is σ = 2149858249920. Its totient is φ = 788641577856.

The previous prime is 1305441112159. The next prime is 1305441112223. The reversal of 1305441112221 is 1222111445031.

1305441112221 is a `hidden beast` number, since 1 + 3 + 0 + 544 + 1 + 112 + 2 + 2 + 1 = 666.

It is not a de Polignac number, because 1305441112221 - 2⁷ = 1305441112093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305441112223) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1730316 + ... + 2367461.

Almost surely, 2^{1305441112221} is an apocalyptic number.

It is an amenable number.

1305441112221 is a deficient number, since it is larger than the sum of its proper divisors (844417137699).

1305441112221 is an equidigital number, since it uses as much as digits as its factorization.

1305441112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4097837 (or 4097822 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

Adding to 1305441112221 its reverse (1222111445031), we get a palindrome (2527552557252).

The spelling of 1305441112221 in words is "one trillion, three hundred five billion, four hundred forty-one million, one hundred twelve thousand, two hundred twenty-one".