1201021100000 has 288 divisors, whose sum is σ = 3153771083232. Its totient is φ = 448614400000.

The previous prime is 1201021099897. The next prime is 1201021100003. The reversal of 1201021100000 is 11201021.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201021100003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 222697304 + ... + 222702696.

It is an arithmetic number, because the mean of its divisors is an integer number (10950594039).

Almost surely, 2^{1201021100000} is an apocalyptic number.

1201021100000 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 1201021100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1576885541616).

1201021100000 is an abundant number, since it is smaller than the sum of its proper divisors (1952749983232).

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

1201021100000 is an equidigital number, since it uses as much as digits as its factorization.

1201021100000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5576 (or 5548 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1201021100000 its reverse (11201021), we get a palindrome (1201032301021).

The spelling of 1201021100000 in words is "one trillion, two hundred one billion, twenty-one million, one hundred thousand".