2001021323232 has 96 divisors (see below), whose sum is σ = 5342295288960. Its totient is φ = 655629995520.

The previous prime is 2001021323179. The next prime is 2001021323267. The reversal of 2001021323232 is 2323231201002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 2001021323199 and 2001021323208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83152482 + ... + 83176542.

It is an arithmetic number, because the mean of its divisors is an integer number (55648909260).

Almost surely, 2^{2001021323232} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001021323232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2671147644480).

2001021323232 is an abundant number, since it is smaller than the sum of its proper divisors (3341273965728).

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

2001021323232 is a wasteful number, since it uses less digits than its factorization.

2001021323232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38816 (or 38808 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 2001021323232 its reverse (2323231201002), we get a palindrome (4324252524234).

The spelling of 2001021323232 in words is "two trillion, one billion, twenty-one million, three hundred twenty-three thousand, two hundred thirty-two".