1220111444 has 12 divisors (see below), whose sum is σ = 2141932884. Its totient is φ = 608130624.

The previous prime is 1220111443. The next prime is 1220111449. The reversal of 1220111444 is 4441110221.

It can be written as a sum of positive squares in 2 ways, for example, as 37576900 + 1182534544 = 6130^2 + 34388^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220111443) 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, 479849 + ... + 482384.

It is an arithmetic number, because the mean of its divisors is an integer number (178494407).

Almost surely, 2^1220111444 is an apocalyptic number.

It is an amenable number.

1220111444 is a deficient number, since it is larger than the sum of its proper divisors (921821440).

1220111444 is a wasteful number, since it uses less digits than its factorization.

1220111444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962554 (or 962552 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 1220111444 is about 34930.0936729348. The cubic root of 1220111444 is about 1068.5622650127.

Adding to 1220111444 its reverse (4441110221), we get a palindrome (5661221665).

The spelling of 1220111444 in words is "one billion, two hundred twenty million, one hundred eleven thousand, four hundred forty-four".