1123221210 has 64 divisors (see below), whose sum is σ = 2803852800. Its totient is φ = 287718912.

The previous prime is 1123221179. The next prime is 1123221217. The reversal of 1123221210 is 121223211.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1123221210.

It is not an unprimeable number, because it can be changed into a prime (1123221217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81286 + ... + 94094.

It is an arithmetic number, because the mean of its divisors is an integer number (43810200).

Almost surely, 2^1123221210 is an apocalyptic number.

1123221210 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 1123221210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1401926400).

1123221210 is an abundant number, since it is smaller than the sum of its proper divisors (1680631590).

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

1123221210 is a wasteful number, since it uses less digits than its factorization.

1123221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12935.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1123221210 is about 33514.4925368116. The cubic root of 1123221210 is about 1039.4934694346.

Adding to 1123221210 its reverse (121223211), we get a palindrome (1244444421).

The spelling of 1123221210 in words is "one billion, one hundred twenty-three million, two hundred twenty-one thousand, two hundred ten".