2021000101 has 4 divisors (see below), whose sum is σ = 2055254400. Its totient is φ = 1986745804.

The previous prime is 2021000083. The next prime is 2021000119. The reversal of 2021000101 is 1010001202.

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 an interprime number because it is at equal distance from previous prime (2021000083) and next prime (2021000119).

It is a cyclic number.

It is not a de Polignac number, because 2021000101 - 2¹⁷ = 2020869029 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 (2021000131) 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, 17127061 + ... + 17127178.

It is an arithmetic number, because the mean of its divisors is an integer number (513813600).

Almost surely, 2^2021000101 is an apocalyptic number.

It is an amenable number.

2021000101 is a deficient number, since it is larger than the sum of its proper divisors (34254299).

2021000101 is an equidigital number, since it uses as much as digits as its factorization.

2021000101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34254298.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 2021000101 is about 44955.5347093103. The cubic root of 2021000101 is about 1264.3154500046.

Adding to 2021000101 its reverse (1010001202), we get a palindrome (3031001303).

The spelling of 2021000101 in words is "two billion, twenty-one million, one hundred one", and thus it is an aban number.