2001232021 has 8 divisors (see below), whose sum is σ = 2034694080. Its totient is φ = 1968043488.

The previous prime is 2001231989. The next prime is 2001232069. The reversal of 2001232021 is 1202321002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2001232021 - 2⁵ = 2001231989 is a prime.

It is a super-4 number, since 4×2001232021⁴ (a number of 38 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001231992 and 2001232010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001232421) 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, 53601 + ... + 82918.

It is an arithmetic number, because the mean of its divisors is an integer number (254336760).

Almost surely, 2^2001232021 is an apocalyptic number.

It is an amenable number.

2001232021 is a deficient number, since it is larger than the sum of its proper divisors (33462059).

2001232021 is a wasteful number, since it uses less digits than its factorization.

2001232021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136763.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2001232021 is about 44735.1318428816. The cubic root of 2001232021 is about 1260.1797049894.

Adding to 2001232021 its reverse (1202321002), we get a palindrome (3203553023).

The spelling of 2001232021 in words is "two billion, one million, two hundred thirty-two thousand, twenty-one".