1200020020000 has 120 divisors (see below), whose sum is σ = 2961860788656. Its totient is φ = 478442016000.

The previous prime is 1200020019983. The next prime is 1200020020009. The reversal of 1200020020000 is 200200021.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1200020020009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6042279 + ... + 6237721.

Almost surely, 2^{1200020020000} is an apocalyptic number.

1200020020000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200020020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1480930394328).

1200020020000 is an abundant number, since it is smaller than the sum of its proper divisors (1761840768656).

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

1200020020000 is an equidigital number, since it uses as much as digits as its factorization.

1200020020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195780 (or 195757 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

Adding to 1200020020000 its reverse (200200021), we get a palindrome (1200220220021).

The spelling of 1200020020000 in words is "one trillion, two hundred billion, twenty million, twenty thousand".