1243101031440 has 160 divisors (see below), whose sum is σ = 3884925027456. Its totient is φ = 328810352640.

The previous prime is 1243101031433. The next prime is 1243101031453. The reversal of 1243101031440 is 441301013421.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1243101031440.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15609964 + ... + 15689396.

Almost surely, 2^{1243101031440} is an apocalyptic number.

1243101031440 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 1243101031440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1942462513728).

1243101031440 is an abundant number, since it is smaller than the sum of its proper divisors (2641823996016).

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

1243101031440 is a wasteful number, since it uses less digits than its factorization.

1243101031440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79977 (or 79971 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 1243101031440 its reverse (441301013421), we get a palindrome (1684402044861).

The spelling of 1243101031440 in words is "one trillion, two hundred forty-three billion, one hundred one million, thirty-one thousand, four hundred forty".