1101323220 has 96 divisors (see below), whose sum is σ = 3294681600. Its totient is φ = 274057344.

The previous prime is 1101323213. The next prime is 1101323231. The reversal of 1101323220 is 223231011.

It is a super-2 number, since 2×1101323220² = 2425825669822336800, which contains 22 as substring.

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 1101323220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69171 + ... + 83589.

It is an arithmetic number, because the mean of its divisors is an integer number (34319600).

Almost surely, 2^1101323220 is an apocalyptic number.

1101323220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1101323220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1647340800).

1101323220 is an abundant number, since it is smaller than the sum of its proper divisors (2193358380).

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

1101323220 is a wasteful number, since it uses less digits than its factorization.

1101323220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14517 (or 14515 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1101323220 is about 33186.1902001420. The cubic root of 1101323220 is about 1032.6938688969.

Adding to 1101323220 its reverse (223231011), we get a palindrome (1324554231).

The spelling of 1101323220 in words is "one billion, one hundred one million, three hundred twenty-three thousand, two hundred twenty".