2021002169 has 2 divisors, whose sum is σ = 2021002170. Its totient is φ = 2021002168.

The previous prime is 2021002097. The next prime is 2021002187. The reversal of 2021002169 is 9612001202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1202355625 + 818646544 = 34675^2 + 28612^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021002169 - 2²⁴ = 2004224953 is a prime.

It is a super-2 number, since 2×2021002169² = 8168899534205409122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2021007169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010501084 + 1010501085.

It is an arithmetic number, because the mean of its divisors is an integer number (1010501085).

Almost surely, 2^2021002169 is an apocalyptic number.

It is an amenable number.

2021002169 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021002169 is an equidigital number, since it uses as much as digits as its factorization.

2021002169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 2021002169 is about 44955.5577098094. The cubic root of 2021002169 is about 1264.3158812438.

The spelling of 2021002169 in words is "two billion, twenty-one million, two thousand, one hundred sixty-nine".