1201221020000 has 240 divisors, whose sum is σ = 3159489164832. Its totient is φ = 447820800000.

The previous prime is 1201221019967. The next prime is 1201221020023. The reversal of 1201221020000 is 201221021.

It is a happy number.

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 39 ways as a sum of consecutive naturals, for example, 35002850 + ... + 35037150.

Almost surely, 2^{1201221020000} is an apocalyptic number.

1201221020000 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 1201221020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1579744582416).

1201221020000 is an abundant number, since it is smaller than the sum of its proper divisors (1958268144832).

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

1201221020000 is a wasteful number, since it uses less digits than its factorization.

1201221020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34451 (or 34428 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1201221020000 its reverse (201221021), we get a palindrome (1201422241021).

The spelling of 1201221020000 in words is "one trillion, two hundred one billion, two hundred twenty-one million, twenty thousand".