1200555412000 has 96 divisors (see below), whose sum is σ = 3371159675520. Its totient is φ = 411618988800.

The previous prime is 1200555411989. The next prime is 1200555412003. The reversal of 1200555412000 is 2145550021.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1200555412003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21410490 + ... + 21466489.

It is an arithmetic number, because the mean of its divisors is an integer number (35116246620).

Almost surely, 2^{1200555412000} is an apocalyptic number.

1200555412000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200555412000 is an abundant number, since it is smaller than the sum of its proper divisors (2170604263520).

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

1200555412000 is an equidigital number, since it uses as much as digits as its factorization.

1200555412000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42877011 (or 42876993 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The spelling of 1200555412000 in words is "one trillion, two hundred billion, five hundred fifty-five million, four hundred twelve thousand".