2021140109 has 2 divisors, whose sum is σ = 2021140110. Its totient is φ = 2021140108.

The previous prime is 2021140097. The next prime is 2021140129. The reversal of 2021140109 is 9010411202.

It is an a-pointer prime, because the next prime (2021140129) can be obtained adding 2021140109 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2013316900 + 7823209 = 44870^2 + 2797^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021140109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021140129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010570054 + 1010570055.

It is an arithmetic number, because the mean of its divisors is an integer number (1010570055).

Almost surely, 2^2021140109 is an apocalyptic number.

It is an amenable number.

2021140109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021140109 is an equidigital number, since it uses as much as digits as its factorization.

2021140109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 2021140109 is about 44957.0918654666. The cubic root of 2021140109 is about 1264.3446451524.

The spelling of 2021140109 in words is "two billion, twenty-one million, one hundred forty thousand, one hundred nine".