2001132021 has 48 divisors (see below), whose sum is σ = 3143467008. Its totient is φ = 1129010400.

The previous prime is 2001132017. The next prime is 2001132031. The reversal of 2001132021 is 1202311002.

It is not a de Polignac number, because 2001132021 - 2² = 2001132017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001131988 and 2001132006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001132031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7384116 + ... + 7384386.

It is an arithmetic number, because the mean of its divisors is an integer number (65488896).

Almost surely, 2^2001132021 is an apocalyptic number.

2001132021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2001132021 is a deficient number, since it is larger than the sum of its proper divisors (1142334987).

2001132021 is a wasteful number, since it uses less digits than its factorization.

2001132021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742 (or 735 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2001132021 is about 44734.0141391313. The cubic root of 2001132021 is about 1260.1587145747.

Adding to 2001132021 its reverse (1202311002), we get a palindrome (3203443023).

The spelling of 2001132021 in words is "two billion, one million, one hundred thirty-two thousand, twenty-one".