1111110221 has 16 divisors (see below), whose sum is σ = 1228566528. Its totient is φ = 998457600.

The previous prime is 1111110199. The next prime is 1111110223. The reversal of 1111110221 is 1220111111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111110221 is a prime.

It is a super-3 number, since 3×1111110221³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111110223) 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 15 ways as a sum of consecutive naturals, for example, 111941 + ... + 121461.

It is an arithmetic number, because the mean of its divisors is an integer number (76785408).

Almost surely, 2^1111110221 is an apocalyptic number.

It is an amenable number.

1111110221 is a deficient number, since it is larger than the sum of its proper divisors (117456307).

1111110221 is a wasteful number, since it uses less digits than its factorization.

1111110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9772.

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

The square root of 1111110221 is about 33333.3199816640. The cubic root of 1111110221 is about 1035.7438920730.

Adding to 1111110221 its reverse (1220111111), we get a palindrome (2331221332).

The spelling of 1111110221 in words is "one billion, one hundred eleven million, one hundred ten thousand, two hundred twenty-one".