1220543315011 has 4 divisors (see below), whose sum is σ = 1226867373832. Its totient is φ = 1214219256192.

The previous prime is 1220543314987. The next prime is 1220543315021. The reversal of 1220543315011 is 1105133450221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220543315011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220543315021) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3162029121 + ... + 3162029506.

It is an arithmetic number, because the mean of its divisors is an integer number (306716843458).

Almost surely, 2^{1220543315011} is an apocalyptic number.

1220543315011 is a deficient number, since it is larger than the sum of its proper divisors (6324058821).

1220543315011 is an equidigital number, since it uses as much as digits as its factorization.

1220543315011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6324058820.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 1220543315011 its reverse (1105133450221), we get a palindrome (2325676765232).

The spelling of 1220543315011 in words is "one trillion, two hundred twenty billion, five hundred forty-three million, three hundred fifteen thousand, eleven".