231121369 has 2 divisors, whose sum is σ = 231121370. Its totient is φ = 231121368.

The previous prime is 231121367. The next prime is 231121417. The reversal of 231121369 is 963121132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219424969 + 11696400 = 14813^2 + 3420^2 .

It is a cyclic number.

It is not a de Polignac number, because 231121369 - 2¹ = 231121367 is a prime.

It is a super-2 number, since 2×231121369² = 106834174416868322, which contains 22 as substring.

Together with 231121367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (231121367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115560684 + 115560685.

It is an arithmetic number, because the mean of its divisors is an integer number (115560685).

Almost surely, 2^231121369 is an apocalyptic number.

It is an amenable number.

231121369 is a deficient number, since it is larger than the sum of its proper divisors (1).

231121369 is an equidigital number, since it uses as much as digits as its factorization.

231121369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 28.

The square root of 231121369 is about 15202.6763762174. The cubic root of 231121369 is about 613.6866847466.

The spelling of 231121369 in words is "two hundred thirty-one million, one hundred twenty-one thousand, three hundred sixty-nine".