2010021 has 8 divisors (see below), whose sum is σ = 2886240. Its totient is φ = 1236912.

The previous prime is 2010017. The next prime is 2010023. The reversal of 2010021 is 1200102.

It is a happy number.

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

It is not a de Polignac number, because 2010021 - 2² = 2010017 is a prime.

2010021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2009991 and 2010009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2010023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25731 + ... + 25808.

It is an arithmetic number, because the mean of its divisors is an integer number (360780).

2^2010021 is an apocalyptic number.

It is an amenable number.

2010021 is a deficient number, since it is larger than the sum of its proper divisors (876219).

2010021 is a wasteful number, since it uses less digits than its factorization.

2010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51555.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 2010021 is about 1417.7520939854. The cubic root of 2010021 is about 126.2021823290.

Adding to 2010021 its reverse (1200102), we get a palindrome (3210123).

The spelling of 2010021 in words is "two million, ten thousand, twenty-one".