1220544004505 has 16 divisors (see below), whose sum is σ = 1677864923904. Its totient is φ = 834956458560.

The previous prime is 1220544004487. The next prime is 1220544004507. The reversal of 1220544004505 is 5054004450221.

It is not a de Polignac number, because 1220544004505 - 2²⁶ = 1220476895641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220544004507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41401757 + ... + 41431226.

It is an arithmetic number, because the mean of its divisors is an integer number (104866557744).

Almost surely, 2^{1220544004505} is an apocalyptic number.

It is an amenable number.

1220544004505 is a deficient number, since it is larger than the sum of its proper divisors (457320919399).

1220544004505 is an equidigital number, since it uses as much as digits as its factorization.

1220544004505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82833416.

The product of its (nonzero) digits is 32000, while the sum is 32.

Adding to 1220544004505 its reverse (5054004450221), we get a palindrome (6274548454726).

The spelling of 1220544004505 in words is "one trillion, two hundred twenty billion, five hundred forty-four million, four thousand, five hundred five".