121010161 has 2 divisors, whose sum is σ = 121010162. Its totient is φ = 121010160.

The previous prime is 121010159. The next prime is 121010173. The reversal of 121010161 is 161010121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88736400 + 32273761 = 9420^2 + 5681^2 .

It is an emirp because it is prime and its reverse (161010121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121010161 - 2¹ = 121010159 is a prime.

Together with 121010159, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (121010261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60505080 + 60505081.

It is an arithmetic number, because the mean of its divisors is an integer number (60505081).

Almost surely, 2^121010161 is an apocalyptic number.

It is an amenable number.

121010161 is a deficient number, since it is larger than the sum of its proper divisors (1).

121010161 is an equidigital number, since it uses as much as digits as its factorization.

121010161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 121010161 is about 11000.4618539405. The cubic root of 121010161 is about 494.6225888945.

Adding to 121010161 its reverse (161010121), we get a palindrome (282020282).

The spelling of 121010161 in words is "one hundred twenty-one million, ten thousand, one hundred sixty-one".