2001303021 has 16 divisors (see below), whose sum is σ = 2778019200. Its totient is φ = 1279981248.

The previous prime is 2001303011. The next prime is 2001303023. The reversal of 2001303021 is 1203031002.

It is a happy number.

It is not a de Polignac number, because 2001303021 - 2²² = 1997108717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001302988 and 2001303006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001303023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59601 + ... + 86918.

It is an arithmetic number, because the mean of its divisors is an integer number (173626200).

Almost surely, 2^2001303021 is an apocalyptic number.

It is an amenable number.

2001303021 is a deficient number, since it is larger than the sum of its proper divisors (776716179).

2001303021 is a wasteful number, since it uses less digits than its factorization.

2001303021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146708.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 2001303021 is about 44735.9253955923. The cubic root of 2001303021 is about 1260.1946077593.

Adding to 2001303021 its reverse (1203031002), we get a palindrome (3204334023).

The spelling of 2001303021 in words is "two billion, one million, three hundred three thousand, twenty-one".