121019 has 2 divisors, whose sum is σ = 121020. Its totient is φ = 121018.

The previous prime is 121013. The next prime is 121021. The reversal of 121019 is 910121.

It is a strong prime.

It is an emirp because it is prime and its reverse (910121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121019 - 2⁸ = 120763 is a prime.

It is a super-2 number, since 2×121019² = 29291196722, which contains 22 as substring.

Together with 121021, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 120994 and 121012.

It is not a weakly prime, because it can be changed into another prime (121013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60509 + 60510.

It is an arithmetic number, because the mean of its divisors is an integer number (60510).

2¹²¹⁰¹⁹ is an apocalyptic number.

121019 is a deficient number, since it is larger than the sum of its proper divisors (1).

121019 is an equidigital number, since it uses as much as digits as its factorization.

121019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 121019 is about 347.8778521263. The cubic root of 121019 is about 49.4634631582.

The spelling of 121019 in words is "one hundred twenty-one thousand, nineteen".