2131021169 has 2 divisors, whose sum is σ = 2131021170. Its totient is φ = 2131021168.

The previous prime is 2131021157. The next prime is 2131021241. The reversal of 2131021169 is 9611201312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1839294769 + 291726400 = 42887^2 + 17080^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131021169 - 2¹² = 2131017073 is a prime.

It is a super-2 number, since 2×2131021169² = 9082502445452253122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2131020169) 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, 1065510584 + 1065510585.

It is an arithmetic number, because the mean of its divisors is an integer number (1065510585).

Almost surely, 2^2131021169 is an apocalyptic number.

It is an amenable number.

2131021169 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131021169 is an equidigital number, since it uses as much as digits as its factorization.

2131021169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 2131021169 is about 46162.9848363383. The cubic root of 2131021169 is about 1286.8539342437.

The spelling of 2131021169 in words is "two billion, one hundred thirty-one million, twenty-one thousand, one hundred sixty-nine".