1200012012000 has 144 divisors (see below), whose sum is σ = 4258842758352. Its totient is φ = 320003193600.

The previous prime is 1200012011983. The next prime is 1200012012013. The reversal of 1200012012000 is 2102100021.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16630834 + ... + 16702833.

It is an arithmetic number, because the mean of its divisors is an integer number (29575296933).

Almost surely, 2^{1200012012000} is an apocalyptic number.

1200012012000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200012012000 is an abundant number, since it is smaller than the sum of its proper divisors (3058830746352).

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

1200012012000 is a wasteful number, since it uses less digits than its factorization.

1200012012000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33333698 (or 33333677 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1200012012000 its reverse (2102100021), we get a palindrome (1202114112021).

The spelling of 1200012012000 in words is "one trillion, two hundred billion, twelve million, twelve thousand".