2000421021 has 16 divisors (see below), whose sum is σ = 2858419584. Its totient is φ = 1241152704.

The previous prime is 2000421011. The next prime is 2000421047. The reversal of 2000421021 is 1201240002.

It is not a de Polignac number, because 2000421021 - 2¹⁵ = 2000388253 is a prime.

It is a super-2 number, since 2×2000421021² = 8003368522517364882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2000420988 and 2000421006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000421001) 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, 389226 + ... + 394331.

It is an arithmetic number, because the mean of its divisors is an integer number (178651224).

Almost surely, 2^2000421021 is an apocalyptic number.

It is an amenable number.

2000421021 is a deficient number, since it is larger than the sum of its proper divisors (857998563).

2000421021 is a wasteful number, since it uses less digits than its factorization.

2000421021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783620.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2000421021 is about 44726.0664601751. The cubic root of 2000421021 is about 1260.0094525620.

Adding to 2000421021 its reverse (1201240002), we get a palindrome (3201661023).

The spelling of 2000421021 in words is "two billion, four hundred twenty-one thousand, twenty-one".