1123012303220 has 96 divisors (see below), whose sum is σ = 2477020452480. Its totient is φ = 427076052480.

The previous prime is 1123012303159. The next prime is 1123012303229. The reversal of 1123012303220 is 223032103211.

It is a super-2 number, since 2×1123012303220² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1123012303192 and 1123012303201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123012303229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156252467 + ... + 156259653.

It is an arithmetic number, because the mean of its divisors is an integer number (25802296380).

Almost surely, 2^{1123012303220} is an apocalyptic number.

1123012303220 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 1123012303220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1238510226240).

1123012303220 is an abundant number, since it is smaller than the sum of its proper divisors (1354008149260).

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

1123012303220 is a wasteful number, since it uses less digits than its factorization.

1123012303220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11313 (or 11311 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1123012303220 its reverse (223032103211), we get a palindrome (1346044406431).

The spelling of 1123012303220 in words is "one trillion, one hundred twenty-three billion, twelve million, three hundred three thousand, two hundred twenty".