1123421204440 has 16 divisors (see below), whose sum is σ = 2527697710080. Its totient is φ = 449368481760.

The previous prime is 1123421204419. The next prime is 1123421204453. The reversal of 1123421204440 is 444021243211.

It is a junction number, because it is equal to n+sod(n) for n = 1123421204399 and 1123421204408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14042765016 + ... + 14042765095.

It is an arithmetic number, because the mean of its divisors is an integer number (157981106880).

Almost surely, 2^{1123421204440} is an apocalyptic number.

1123421204440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123421204440 is an abundant number, since it is smaller than the sum of its proper divisors (1404276505640).

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

1123421204440 is a wasteful number, since it uses less digits than its factorization.

1123421204440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28085530122 (or 28085530118 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 1123421204440 its reverse (444021243211), we get a palindrome (1567442447651).

The spelling of 1123421204440 in words is "one trillion, one hundred twenty-three billion, four hundred twenty-one million, two hundred four thousand, four hundred forty".