1111221110 has 16 divisors (see below), whose sum is σ = 2025518400. Its totient is φ = 438861696.

The previous prime is 1111221109. The next prime is 1111221113. The reversal of 1111221110 is 111221111.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1111221091 and 1111221100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111221113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 702515 + ... + 704094.

It is an arithmetic number, because the mean of its divisors is an integer number (126594900).

Almost surely, 2^1111221110 is an apocalyptic number.

1111221110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1111221110 is a deficient number, since it is larger than the sum of its proper divisors (914297290).

1111221110 is a wasteful number, since it uses less digits than its factorization.

1111221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406695.

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

The square root of 1111221110 is about 33334.9832758320. The cubic root of 1111221110 is about 1035.7783467358.

Adding to 1111221110 its reverse (111221111), we get a palindrome (1222442221).

Subtracting from 1111221110 its reverse (111221111), we obtain a palindrome (999999999).

It can be divided in two parts, 111 and 1221110, that added together give a palindrome (1221221).

The spelling of 1111221110 in words is "one billion, one hundred eleven million, two hundred twenty-one thousand, one hundred ten".