121112219 has 4 divisors (see below), whose sum is σ = 121325640. Its totient is φ = 120898800.

The previous prime is 121112203. The next prime is 121112263. The reversal of 121112219 is 912211121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 912211121 = 1289 ⋅707689.

It is a cyclic number.

It is not a de Polignac number, because 121112219 - 2⁴ = 121112203 is a prime.

It is a super-2 number, since 2×121112219² = 29336339182207922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121112219.

It is not an unprimeable number, because it can be changed into a prime (121117219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105857 + ... + 106994.

It is an arithmetic number, because the mean of its divisors is an integer number (30331410).

Almost surely, 2^121112219 is an apocalyptic number.

121112219 is a deficient number, since it is larger than the sum of its proper divisors (213421).

121112219 is an equidigital number, since it uses as much as digits as its factorization.

121112219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213420.

The product of its digits is 72, while the sum is 20.

The square root of 121112219 is about 11005.0996815113. The cubic root of 121112219 is about 494.7616020347.

The spelling of 121112219 in words is "one hundred twenty-one million, one hundred twelve thousand, two hundred nineteen".