1220443531105 has 16 divisors (see below), whose sum is σ = 1473202552464. Its totient is φ = 970576185600.

The previous prime is 1220443531091. The next prime is 1220443531157. The reversal of 1220443531105 is 5011353440221.

It can be written as a sum of positive squares in 8 ways, for example, as 450853159936 + 769590371169 = 671456^2 + 877263^2 .

It is not a de Polignac number, because 1220443531105 - 2¹⁹ = 1220443006817 is a prime.

It is a super-2 number, since 2×1220443531105² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6373255 + ... + 6561955.

It is an arithmetic number, because the mean of its divisors is an integer number (92075159529).

Almost surely, 2^{1220443531105} is an apocalyptic number.

It is an amenable number.

1220443531105 is a deficient number, since it is larger than the sum of its proper divisors (252759021359).

1220443531105 is a wasteful number, since it uses less digits than its factorization.

1220443531105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196356.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 1220443531105 its reverse (5011353440221), we get a palindrome (6231796971326).

The spelling of 1220443531105 in words is "one trillion, two hundred twenty billion, four hundred forty-three million, five hundred thirty-one thousand, one hundred five".