2050021 has 2 divisors, whose sum is σ = 2050022. Its totient is φ = 2050020.

The previous prime is 2050007. The next prime is 2050031. The reversal of 2050021 is 1200502.

It is an a-pointer prime, because the next prime (2050031) can be obtained adding 2050021 to its sum of digits (10).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1999396 + 50625 = 1414^2 + 225^2 .

It is a cyclic number.

It is not a de Polignac number, because 2050021 - 2⁷ = 2049893 is a prime.

It is a super-2 number, since 2×2050021² = 8405172200882, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2050031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025010 + 1025011.

It is an arithmetic number, because the mean of its divisors is an integer number (1025011).

2^2050021 is an apocalyptic number.

It is an amenable number.

2050021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2050021 is an equidigital number, since it uses as much as digits as its factorization.

2050021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 2050021 is about 1431.7894398270. The cubic root of 2050021 is about 127.0338430484.

Adding to 2050021 its reverse (1200502), we get a palindrome (3250523).

The spelling of 2050021 in words is "two million, fifty thousand, twenty-one".