2001321123132 has 12 divisors (see below), whose sum is σ = 4669749287336. Its totient is φ = 667107041040.

The previous prime is 2001321123127. The next prime is 2001321123157. The reversal of 2001321123132 is 2313211231002.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 2001321123099 and 2001321123108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83388380119 + ... + 83388380142.

Almost surely, 2^{2001321123132} is an apocalyptic number.

It is an amenable number.

2001321123132 is an abundant number, since it is smaller than the sum of its proper divisors (2668428164204).

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

2001321123132 is a wasteful number, since it uses less digits than its factorization.

2001321123132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166776760268 (or 166776760266 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 2001321123132 its reverse (2313211231002), we get a palindrome (4314532354134).

The spelling of 2001321123132 in words is "two trillion, one billion, three hundred twenty-one million, one hundred twenty-three thousand, one hundred thirty-two".