1111221210 has 64 divisors (see below), whose sum is σ = 2936165760. Its totient is φ = 266906880.

The previous prime is 1111221203. The next prime is 1111221229. The reversal of 1111221210 is 121221111.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 20524 + ... + 51416.

It is an arithmetic number, because the mean of its divisors is an integer number (45877590).

Almost surely, 2^1111221210 is an apocalyptic number.

1111221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1111221210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1468082880).

1111221210 is an abundant number, since it is smaller than the sum of its proper divisors (1824944550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1111221210 is a wasteful number, since it uses less digits than its factorization.

1111221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31023.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1111221210 is about 33334.9847757577. The cubic root of 1111221210 is about 1035.7783778060.

Adding to 1111221210 its reverse (121221111), we get a palindrome (1232442321).

Subtracting from 1111221210 its reverse (121221111), we obtain a palindrome (990000099).

The spelling of 1111221210 in words is "one billion, one hundred eleven million, two hundred twenty-one thousand, two hundred ten".