121219 has 4 divisors (see below), whose sum is σ = 138544. Its totient is φ = 103896.

The previous prime is 121189. The next prime is 121229. The reversal of 121219 is 912121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 912121 = 7 ⋅130303.

It is a cyclic number.

It is not a de Polignac number, because 121219 - 2¹³ = 113027 is a prime.

It is a super-2 number, since 2×121219² = 29388091922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8652 + ... + 8665.

It is an arithmetic number, because the mean of its divisors is an integer number (34636).

2¹²¹²¹⁹ is an apocalyptic number.

121219 is a deficient number, since it is larger than the sum of its proper divisors (17325).

121219 is an equidigital number, since it uses as much as digits as its factorization.

121219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17324.

The product of its digits is 36, while the sum is 16.

The square root of 121219 is about 348.1651906782. The cubic root of 121219 is about 49.4906964796.

The spelling of 121219 in words is "one hundred twenty-one thousand, two hundred nineteen".