121369 has 2 divisors, whose sum is σ = 121370. Its totient is φ = 121368.

The previous prime is 121367. The next prime is 121379. The reversal of 121369 is 963121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97344 + 24025 = 312^2 + 155^2 .

It is an emirp because it is prime and its reverse (963121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121369 - 2¹ = 121367 is a prime.

It is a super-2 number, since 2×121369² = 29460868322, which contains 22 as substring.

Together with 121367, it forms a pair of twin primes.

It is a nialpdrome in base 13.

It is not a weakly prime, because it can be changed into another prime (121367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60684 + 60685.

It is an arithmetic number, because the mean of its divisors is an integer number (60685).

2¹²¹³⁶⁹ is an apocalyptic number.

It is an amenable number.

121369 is a deficient number, since it is larger than the sum of its proper divisors (1).

121369 is an equidigital number, since it uses as much as digits as its factorization.

121369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 22.

The square root of 121369 is about 348.3805390661. The cubic root of 121369 is about 49.5111018190.

The spelling of 121369 in words is "one hundred twenty-one thousand, three hundred sixty-nine".