100202161 has 2 divisors, whose sum is σ = 100202162. Its totient is φ = 100202160.

The previous prime is 100202153. The next prime is 100202213. The reversal of 100202161 is 161202001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71910400 + 28291761 = 8480^2 + 5319^2 .

It is an emirp because it is prime and its reverse (161202001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100202161 - 2³ = 100202153 is a prime.

It is not a weakly prime, because it can be changed into another prime (100202101) 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, 50101080 + 50101081.

It is an arithmetic number, because the mean of its divisors is an integer number (50101081).

Almost surely, 2^100202161 is an apocalyptic number.

It is an amenable number.

100202161 is a deficient number, since it is larger than the sum of its proper divisors (1).

100202161 is an equidigital number, since it uses as much as digits as its factorization.

100202161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 100202161 is about 10010.1029465236. The cubic root of 100202161 is about 464.4714555695.

Adding to 100202161 its reverse (161202001), we get a palindrome (261404162).

The spelling of 100202161 in words is "one hundred million, two hundred two thousand, one hundred sixty-one".