121021169 has 2 divisors, whose sum is σ = 121021170. Its totient is φ = 121021168.

The previous prime is 121021157. The next prime is 121021171. The reversal of 121021169 is 961120121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118810000 + 2211169 = 10900^2 + 1487^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121021169 is a prime.

It is a super-2 number, since 2×121021169² = 29292246692253122, which contains 22 as substring.

Together with 121021171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121021969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510584 + 60510585.

It is an arithmetic number, because the mean of its divisors is an integer number (60510585).

Almost surely, 2^121021169 is an apocalyptic number.

It is an amenable number.

121021169 is a deficient number, since it is larger than the sum of its proper divisors (1).

121021169 is an equidigital number, since it uses as much as digits as its factorization.

121021169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 121021169 is about 11000.9621851909. The cubic root of 121021169 is about 494.6375866443.

The spelling of 121021169 in words is "one hundred twenty-one million, twenty-one thousand, one hundred sixty-nine".