1200243123120 has 80 divisors (see below), whose sum is σ = 3773158716672. Its totient is φ = 315556872960.

The previous prime is 1200243123097. The next prime is 1200243123127. The reversal of 1200243123120 is 213213420021.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (1200243123127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35201362 + ... + 35235441.

Almost surely, 2^{1200243123120} is an apocalyptic number.

1200243123120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200243123120 is an abundant number, since it is smaller than the sum of its proper divisors (2572915593552).

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

1200243123120 is a wasteful number, since it uses less digits than its factorization.

1200243123120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70436890 (or 70436884 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 1200243123120 its reverse (213213420021), we get a palindrome (1413456543141).

The spelling of 1200243123120 in words is "one trillion, two hundred billion, two hundred forty-three million, one hundred twenty-three thousand, one hundred twenty".