2021430161 has 2 divisors, whose sum is σ = 2021430162. Its totient is φ = 2021430160.

The previous prime is 2021430127. The next prime is 2021430167. The reversal of 2021430161 is 1610341202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2021401600 + 28561 = 44960^2 + 169^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021430161 - 2¹⁴ = 2021413777 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021430167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010715080 + 1010715081.

It is an arithmetic number, because the mean of its divisors is an integer number (1010715081).

Almost surely, 2^2021430161 is an apocalyptic number.

It is an amenable number.

2021430161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021430161 is an equidigital number, since it uses as much as digits as its factorization.

2021430161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 2021430161 is about 44960.3176256574. The cubic root of 2021430161 is about 1264.4051239139.

Adding to 2021430161 its reverse (1610341202), we get a palindrome (3631771363).

The spelling of 2021430161 in words is "two billion, twenty-one million, four hundred thirty thousand, one hundred sixty-one".