1243110445000 has 80 divisors (see below), whose sum is σ = 2917576514160. Its totient is φ = 496395912000.

The previous prime is 1243110444949. The next prime is 1243110445069. The reversal of 1243110445000 is 5440113421.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2723227 + ... + 3146773.

It is an arithmetic number, because the mean of its divisors is an integer number (36469706427).

Almost surely, 2^{1243110445000} is an apocalyptic number.

1243110445000 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 1243110445000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1458788257080).

1243110445000 is an abundant number, since it is smaller than the sum of its proper divisors (1674466069160).

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

1243110445000 is an equidigital number, since it uses as much as digits as its factorization.

1243110445000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424160 (or 424141 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 1243110445000 its reverse (5440113421), we get a palindrome (1248550558421).

The spelling of 1243110445000 in words is "one trillion, two hundred forty-three billion, one hundred ten million, four hundred forty-five thousand".