121319843 has 2 divisors, whose sum is σ = 121319844. Its totient is φ = 121319842.

The previous prime is 121319839. The next prime is 121319857. The reversal of 121319843 is 348913121.

It is a weak prime.

It is an emirp because it is prime and its reverse (348913121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121319843 - 2² = 121319839 is a prime.

It is equal to p_6912482 and since 121319843 and 6912482 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (121319243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60659921 + 60659922.

It is an arithmetic number, because the mean of its divisors is an integer number (60659922).

Almost surely, 2^121319843 is an apocalyptic number.

121319843 is a deficient number, since it is larger than the sum of its proper divisors (1).

121319843 is an equidigital number, since it uses as much as digits as its factorization.

121319843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 121319843 is about 11014.5287234634. The cubic root of 121319843 is about 495.0441657018.

The spelling of 121319843 in words is "one hundred twenty-one million, three hundred nineteen thousand, eight hundred forty-three".