2020121699 has 2 divisors, whose sum is σ = 2020121700. Its totient is φ = 2020121698.

The previous prime is 2020121693. The next prime is 2020121723. The reversal of 2020121699 is 9961210202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2020121699 - 2¹⁶ = 2020056163 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2020121693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010060849 + 1010060850.

It is an arithmetic number, because the mean of its divisors is an integer number (1010060850).

Almost surely, 2^2020121699 is an apocalyptic number.

2020121699 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020121699 is an equidigital number, since it uses as much as digits as its factorization.

2020121699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 2020121699 is about 44945.7639717026. The cubic root of 2020121699 is about 1264.1322505814.

The spelling of 2020121699 in words is "two billion, twenty million, one hundred twenty-one thousand, six hundred ninety-nine".