1220111552 has 28 divisors (see below), whose sum is σ = 2641265736. Its totient is φ = 554595840.

The previous prime is 1220111551. The next prime is 1220111603. The reversal of 1220111552 is 2551110221.

It is not an unprimeable number, because it can be changed into a prime (1220111551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 865853 + ... + 867260.

Almost surely, 2^1220111552 is an apocalyptic number.

It is an amenable number.

1220111552 is an abundant number, since it is smaller than the sum of its proper divisors (1421154184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220111552 is a wasteful number, since it uses less digits than its factorization.

1220111552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733136 (or 1733126 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 1220111552 is about 34930.0952188797. The cubic root of 1220111552 is about 1068.5622965411.

Adding to 1220111552 its reverse (2551110221), we get a palindrome (3771221773).

The spelling of 1220111552 in words is "one billion, two hundred twenty million, one hundred eleven thousand, five hundred fifty-two".