1219985209200 has 120 divisors (see below), whose sum is σ = 3908409618096. Its totient is φ = 325296896000.

The previous prime is 1219985209141. The next prime is 1219985209277. The reversal of 1219985209200 is 29025899121.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1219985209200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13468060 + ... + 13558340.

Almost surely, 2^{1219985209200} is an apocalyptic number.

1219985209200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1219985209200 is an abundant number, since it is smaller than the sum of its proper divisors (2688424408896).

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

1219985209200 is a wasteful number, since it uses less digits than its factorization.

1219985209200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101563 (or 101552 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 48.

The spelling of 1219985209200 in words is "one trillion, two hundred nineteen billion, nine hundred eighty-five million, two hundred nine thousand, two hundred".