2000100021 has 4 divisors (see below), whose sum is σ = 2666800032. Its totient is φ = 1333400012.

The previous prime is 2000099957. The next prime is 2000100097. The reversal of 2000100021 is 1200010002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2000100021 - 2⁶ = 2000099957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2000099982 and 2000100009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000100821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333350001 + ... + 333350006.

It is an arithmetic number, because the mean of its divisors is an integer number (666700008).

Almost surely, 2^2000100021 is an apocalyptic number.

It is an amenable number.

2000100021 is a deficient number, since it is larger than the sum of its proper divisors (666700011).

2000100021 is an equidigital number, since it uses as much as digits as its factorization.

2000100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666700010.

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

The square root of 2000100021 is about 44722.4778047907. The cubic root of 2000100021 is about 1259.9420526386.

Adding to 2000100021 its reverse (1200010002), we get a palindrome (3200110023).

The spelling of 2000100021 in words is "two billion, one hundred thousand, twenty-one".