1220504532503 has 4 divisors (see below), whose sum is σ = 1224428984688. Its totient is φ = 1216580080320.

The previous prime is 1220504532469. The next prime is 1220504532517. The reversal of 1220504532503 is 3052354050221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220504532503 - 2²⁴ = 1220487755287 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220504532503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220504532563) 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, 1962225626 + ... + 1962226247.

It is an arithmetic number, because the mean of its divisors is an integer number (306107246172).

Almost surely, 2^{1220504532503} is an apocalyptic number.

1220504532503 is a deficient number, since it is larger than the sum of its proper divisors (3924452185).

1220504532503 is an equidigital number, since it uses as much as digits as its factorization.

1220504532503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3924452184.

The product of its (nonzero) digits is 36000, while the sum is 32.

Adding to 1220504532503 its reverse (3052354050221), we get a palindrome (4272858582724).

The spelling of 1220504532503 in words is "one trillion, two hundred twenty billion, five hundred four million, five hundred thirty-two thousand, five hundred three".