1001323201200 has 240 divisors, whose sum is σ = 3703591288320. Its totient is φ = 226514165760.

The previous prime is 1001323201129. The next prime is 1001323201283. The reversal of 1001323201200 is 21023231001.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×1001323201200² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1001323201200.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 200341 + ... + 1429259.

It is an arithmetic number, because the mean of its divisors is an integer number (15431630368).

Almost surely, 2^{1001323201200} is an apocalyptic number.

1001323201200 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 1001323201200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1851795644160).

1001323201200 is an abundant number, since it is smaller than the sum of its proper divisors (2702268087120).

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

1001323201200 is a wasteful number, since it uses less digits than its factorization.

1001323201200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229044 (or 1229033 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 1001323201200 its reverse (21023231001), we get a palindrome (1022346432201).

The spelling of 1001323201200 in words is "one trillion, one billion, three hundred twenty-three million, two hundred one thousand, two hundred".