1002021169 has 2 divisors, whose sum is σ = 1002021170. Its totient is φ = 1002021168.

The previous prime is 1002021149. The next prime is 1002021179. The reversal of 1002021169 is 9611202001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 713530944 + 288490225 = 26712^2 + 16985^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002021169 - 2¹⁵ = 1001988401 is a prime.

It is a super-2 number, since 2×1002021169² = 2008092846248253122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1002021109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501010584 + 501010585.

It is an arithmetic number, because the mean of its divisors is an integer number (501010585).

Almost surely, 2^1002021169 is an apocalyptic number.

It is an amenable number.

1002021169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002021169 is an equidigital number, since it uses as much as digits as its factorization.

1002021169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1002021169 is about 31654.7179579917. The cubic root of 1002021169 is about 1000.6732696063.

The spelling of 1002021169 in words is "one billion, two million, twenty-one thousand, one hundred sixty-nine".