1101223420 has 72 divisors (see below), whose sum is σ = 2565046512. Its totient is φ = 396802560.

The previous prime is 1101223411. The next prime is 1101223441. The reversal of 1101223420 is 243221011.

It is a junction number, because it is equal to n+sod(n) for n = 1101223394 and 1101223403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 271447 + ... + 275473.

It is an arithmetic number, because the mean of its divisors is an integer number (35625646).

Almost surely, 2^1101223420 is an apocalyptic number.

1101223420 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 1101223420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1282523256).

1101223420 is an abundant number, since it is smaller than the sum of its proper divisors (1463823092).

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

1101223420 is a wasteful number, since it uses less digits than its factorization.

1101223420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4171 (or 4158 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1101223420 is about 33184.6865285782. The cubic root of 1101223420 is about 1032.6626743122.

Adding to 1101223420 its reverse (243221011), we get a palindrome (1344444431).

The spelling of 1101223420 in words is "one billion, one hundred one million, two hundred twenty-three thousand, four hundred twenty".