1220200556565 has 8 divisors (see below), whose sum is σ = 1952320890528. Its totient is φ = 650773630160.

The previous prime is 1220200556551. The next prime is 1220200556591. The reversal of 1220200556565 is 5656550020221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220200556565 - 2¹² = 1220200552469 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40673351871 + ... + 40673351900.

It is an arithmetic number, because the mean of its divisors is an integer number (244040111316).

Almost surely, 2^{1220200556565} is an apocalyptic number.

1220200556565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220200556565 is a deficient number, since it is larger than the sum of its proper divisors (732120333963).

1220200556565 is an equidigital number, since it uses as much as digits as its factorization.

1220200556565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81346703779.

The product of its (nonzero) digits is 180000, while the sum is 39.

Adding to 1220200556565 its reverse (5656550020221), we get a palindrome (6876750576786).

The spelling of 1220200556565 in words is "one trillion, two hundred twenty billion, two hundred million, five hundred fifty-six thousand, five hundred sixty-five".