2001202021 has 8 divisors (see below), whose sum is σ = 2463017984. Its totient is φ = 1583368560.

The previous prime is 2001202001. The next prime is 2001202031. The reversal of 2001202021 is 1202021002.

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 2001202021 - 2⁵ = 2001201989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001201989 and 2001202007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001202001) 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, 10995525 + ... + 10995706.

It is an arithmetic number, because the mean of its divisors is an integer number (307877248).

Almost surely, 2^2001202021 is an apocalyptic number.

It is an amenable number.

2001202021 is a deficient number, since it is larger than the sum of its proper divisors (461815963).

2001202021 is a wasteful number, since it uses less digits than its factorization.

2001202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21991251.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2001202021 is about 44734.7965346887. The cubic root of 2001202021 is about 1260.1734079384.

Adding to 2001202021 its reverse (1202021002), we get a palindrome (3203223023).

The spelling of 2001202021 in words is "two billion, one million, two hundred two thousand, twenty-one".