1213328128000 has 96 divisors (see below), whose sum is σ = 3027728274480. Its totient is φ = 485331148800.

The previous prime is 1213328127997. The next prime is 1213328128039. The reversal of 1213328128000 is 8218233121.

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 7 ways as a sum of consecutive naturals, for example, 2113782 + ... + 2625781.

Almost surely, 2^{1213328128000} is an apocalyptic number.

1213328128000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213328128000 is an abundant number, since it is smaller than the sum of its proper divisors (1814400146480).

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

1213328128000 is an frugal number, since it uses more digits than its factorization.

1213328128000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4739600 (or 4739570 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The spelling of 1213328128000 in words is "one trillion, two hundred thirteen billion, three hundred twenty-eight million, one hundred twenty-eight thousand".