2001321123232 has 24 divisors (see below), whose sum is σ = 3940268919300. Its totient is φ = 1000617905664.

The previous prime is 2001321123203. The next prime is 2001321123247. The reversal of 2001321123232 is 2323211231002.

It can be written as a sum of positive squares in 2 ways, for example, as 1738484442256 + 262836680976 = 1318516^2 + 512676^2 .

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 3 ways as a sum of consecutive naturals, for example, 563757 + ... + 2078572.

Almost surely, 2^{2001321123232} is an apocalyptic number.

It is an amenable number.

2001321123232 is a deficient number, since it is larger than the sum of its proper divisors (1938947796068).

2001321123232 is a wasteful number, since it uses less digits than its factorization.

2001321123232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2666008 (or 2666000 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 2001321123232 its reverse (2323211231002), we get a palindrome (4324532354234).

The spelling of 2001321123232 in words is "two trillion, one billion, three hundred twenty-one million, one hundred twenty-three thousand, two hundred thirty-two".