2021051 has 4 divisors (see below), whose sum is σ = 2075712. Its totient is φ = 1966392.

The previous prime is 2021029. The next prime is 2021053. The reversal of 2021051 is 1501202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2021051 - 2¹⁰ = 2020027 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27275 + ... + 27348.

It is an arithmetic number, because the mean of its divisors is an integer number (518928).

2^2021051 is an apocalyptic number.

2021051 is a deficient number, since it is larger than the sum of its proper divisors (54661).

2021051 is an equidigital number, since it uses as much as digits as its factorization.

2021051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54660.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 2021051 is about 1421.6367327837. The cubic root of 2021051 is about 126.4326063867.

Adding to 2021051 its reverse (1501202), we get a palindrome (3522253).

The spelling of 2021051 in words is "two million, twenty-one thousand, fifty-one".