1123423224420 has 144 divisors (see below), whose sum is σ = 3659740818048. Its totient is φ = 256740986880.

The previous prime is 1123423224389. The next prime is 1123423224449. The reversal of 1123423224420 is 244223243211.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20502660 + ... + 20557380.

It is an arithmetic number, because the mean of its divisors is an integer number (25414866792).

Almost surely, 2^{1123423224420} is an apocalyptic number.

1123423224420 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 1123423224420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1829870409024).

1123423224420 is an abundant number, since it is smaller than the sum of its proper divisors (2536317593628).

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

1123423224420 is a wasteful number, since it uses less digits than its factorization.

1123423224420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61730 (or 61721 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 1123423224420 its reverse (244223243211), we get a palindrome (1367646467631).

The spelling of 1123423224420 in words is "one trillion, one hundred twenty-three billion, four hundred twenty-three million, two hundred twenty-four thousand, four hundred twenty".