1320243122040 has 128 divisors (see below), whose sum is σ = 4194242933760. Its totient is φ = 331313301504.

The previous prime is 1320243121999. The next prime is 1320243122053. The reversal of 1320243122040 is 402213420231.

It is a happy number.

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 1320243122040.

It is a congruent number.

It is an unprimeable number.

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, 18093069 + ... + 18165891.

It is an arithmetic number, because the mean of its divisors is an integer number (32767522920).

Almost surely, 2^{1320243122040} is an apocalyptic number.

1320243122040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320243122040 is an abundant number, since it is smaller than the sum of its proper divisors (2873999811720).

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

1320243122040 is a wasteful number, since it uses less digits than its factorization.

1320243122040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81741 (or 81737 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 1320243122040 its reverse (402213420231), we get a palindrome (1722456542271).

The spelling of 1320243122040 in words is "one trillion, three hundred twenty billion, two hundred forty-three million, one hundred twenty-two thousand, forty".