1101320220 has 288 divisors, whose sum is σ = 4174216704. Its totient is φ = 211115520.

The previous prime is 1101320203. The next prime is 1101320273. The reversal of 1101320220 is 220231011.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1101320196 and 1101320205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 659827 + ... + 661493.

It is an arithmetic number, because the mean of its divisors is an integer number (14493808).

Almost surely, 2^1101320220 is an apocalyptic number.

1101320220 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 1101320220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2087108352).

1101320220 is an abundant number, since it is smaller than the sum of its proper divisors (3072896484).

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

1101320220 is a wasteful number, since it uses less digits than its factorization.

1101320220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721 (or 1708 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1101320220 is about 33186.1450005872. The cubic root of 1101320220 is about 1032.6929312114.

Adding to 1101320220 its reverse (220231011), we get a palindrome (1321551231).

The spelling of 1101320220 in words is "one billion, one hundred one million, three hundred twenty thousand, two hundred twenty".