1111220445 has 16 divisors (see below), whose sum is σ = 1826006400. Its totient is φ = 576633024.

The previous prime is 1111220441. The next prime is 1111220471. The reversal of 1111220445 is 5440221111.

It is not a de Polignac number, because 1111220445 - 2² = 1111220441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111220441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1000545 + ... + 1001654.

It is an arithmetic number, because the mean of its divisors is an integer number (114125400).

Almost surely, 2^1111220445 is an apocalyptic number.

1111220445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1111220445 is a deficient number, since it is larger than the sum of its proper divisors (714785955).

1111220445 is a wasteful number, since it uses less digits than its factorization.

1111220445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2002244.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1111220445 is about 33334.9733013242. The cubic root of 1111220445 is about 1035.7781401184.

Adding to 1111220445 its reverse (5440221111), we get a palindrome (6551441556).

The spelling of 1111220445 in words is "one billion, one hundred eleven million, two hundred twenty thousand, four hundred forty-five".