1110221111 has 4 divisors (see below), whose sum is σ = 1110499224. Its totient is φ = 1109943000.

The previous prime is 1110221087. The next prime is 1110221141. The reversal of 1110221111 is 1111220111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1111220111 = 19 ⋅58485269.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1110221111 is a prime.

It is a super-4 number, since 4×1110221111⁴ (a number of 37 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1110221092 and 1110221101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1110221141) 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, 132980 + ... + 141081.

It is an arithmetic number, because the mean of its divisors is an integer number (277624806).

Almost surely, 2^1110221111 is an apocalyptic number.

1110221111 is a deficient number, since it is larger than the sum of its proper divisors (278113).

1110221111 is an equidigital number, since it uses as much as digits as its factorization.

1110221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278112.

The product of its (nonzero) digits is 4, while the sum is 11.

The square root of 1110221111 is about 33319.9806572573. The cubic root of 1110221111 is about 1035.4675510537.

Adding to 1110221111 its reverse (1111220111), we get a palindrome (2221441222).

The spelling of 1110221111 in words is "one billion, one hundred ten million, two hundred twenty-one thousand, one hundred eleven".