121012219 has 2 divisors, whose sum is σ = 121012220. Its totient is φ = 121012218.

The previous prime is 121012217. The next prime is 121012249. The reversal of 121012219 is 912210121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121012219 - 2¹ = 121012217 is a prime.

It is a super-2 number, since 2×121012219² = 29287914294607922, which contains 22 as substring.

Together with 121012217, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 121012196 and 121012205.

It is not a weakly prime, because it can be changed into another prime (121012211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60506109 + 60506110.

It is an arithmetic number, because the mean of its divisors is an integer number (60506110).

Almost surely, 2^121012219 is an apocalyptic number.

121012219 is a deficient number, since it is larger than the sum of its proper divisors (1).

121012219 is an equidigital number, since it uses as much as digits as its factorization.

121012219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 121012219 is about 11000.5553950698. Note that the first 3 decimals coincide. The cubic root of 121012219 is about 494.6253928671.

The spelling of 121012219 in words is "one hundred twenty-one million, twelve thousand, two hundred nineteen".