2001321133120 has 56 divisors (see below), whose sum is σ = 4767731489664. Its totient is φ = 800178126336.

The previous prime is 2001321133111. The next prime is 2001321133121. The reversal of 2001321133120 is 213311231002.

It is not an unprimeable number, because it can be changed into a prime (2001321133121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635482 + ... + 2099161.

Almost surely, 2^{2001321133120} is an apocalyptic number.

2001321133120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001321133120 is an abundant number, since it is smaller than the sum of its proper divisors (2766410356544).

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

2001321133120 is a wasteful number, since it uses less digits than its factorization.

2001321133120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2736947 (or 2736937 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 2001321133120 its reverse (213311231002), we get a palindrome (2214632364122).

The spelling of 2001321133120 in words is "two trillion, one billion, three hundred twenty-one million, one hundred thirty-three thousand, one hundred twenty".