1111220145 has 48 divisors (see below), whose sum is σ = 2221914240. Its totient is φ = 503223552.

The previous prime is 1111220119. The next prime is 1111220153. The reversal of 1111220145 is 5410221111.

It is not a de Polignac number, because 1111220145 - 2¹⁰ = 1111219121 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17221 + ... + 50189.

It is an arithmetic number, because the mean of its divisors is an integer number (46289880).

Almost surely, 2^1111220145 is an apocalyptic number.

1111220145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1111220145 is a deficient number, since it is larger than the sum of its proper divisors (1110694095).

1111220145 is a wasteful number, since it uses less digits than its factorization.

1111220145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33094 (or 33091 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 1111220145 is about 33334.9688015453. The cubic root of 1111220145 is about 1035.7780469075.

Adding to 1111220145 its reverse (5410221111), we get a palindrome (6521441256).

The spelling of 1111220145 in words is "one billion, one hundred eleven million, two hundred twenty thousand, one hundred forty-five".