1111345221 has 64 divisors (see below), whose sum is σ = 1834721280. Its totient is φ = 584855040.

The previous prime is 1111345141. The next prime is 1111345241. The reversal of 1111345221 is 1225431111.

It is not a de Polignac number, because 1111345221 - 2¹⁰ = 1111344197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111345241) 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 63 ways as a sum of consecutive naturals, for example, 1173070 + ... + 1174016.

It is an arithmetic number, because the mean of its divisors is an integer number (28667520).

Almost surely, 2^1111345221 is an apocalyptic number.

It is an amenable number.

1111345221 is a deficient number, since it is larger than the sum of its proper divisors (723376059).

1111345221 is a wasteful number, since it uses less digits than its factorization.

1111345221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074.

The product of its digits is 240, while the sum is 21.

The square root of 1111345221 is about 33336.8447967110. The cubic root of 1111345221 is about 1035.8169069286.

Adding to 1111345221 its reverse (1225431111), we get a palindrome (2336776332).

The spelling of 1111345221 in words is "one billion, one hundred eleven million, three hundred forty-five thousand, two hundred twenty-one".