163071121 has 2 divisors, whose sum is σ = 163071122. Its totient is φ = 163071120.

The previous prime is 163071107. The next prime is 163071137. The reversal of 163071121 is 121170361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129140496 + 33930625 = 11364^2 + 5825^2 .

It is a cyclic number.

It is not a de Polignac number, because 163071121 - 2⁷ = 163070993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163071092 and 163071101.

It is not a weakly prime, because it can be changed into another prime (163171121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81535560 + 81535561.

It is an arithmetic number, because the mean of its divisors is an integer number (81535561).

Almost surely, 2^163071121 is an apocalyptic number.

It is an amenable number.

163071121 is a deficient number, since it is larger than the sum of its proper divisors (1).

163071121 is an equidigital number, since it uses as much as digits as its factorization.

163071121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 163071121 is about 12769.9303443676. The cubic root of 163071121 is about 546.3349939224.

The spelling of 163071121 in words is "one hundred sixty-three million, seventy-one thousand, one hundred twenty-one".