121240219 has 2 divisors, whose sum is σ = 121240220. Its totient is φ = 121240218.

The previous prime is 121240211. The next prime is 121240253. The reversal of 121240219 is 912042121.

It is a weak prime.

It is an emirp because it is prime and its reverse (912042121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121240219 - 2³ = 121240211 is a prime.

It is a super-2 number, since 2×121240219² = 29398381406335922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121240219.

It is not a weakly prime, because it can be changed into another prime (121240211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60620109 + 60620110.

It is an arithmetic number, because the mean of its divisors is an integer number (60620110).

Almost surely, 2^121240219 is an apocalyptic number.

121240219 is a deficient number, since it is larger than the sum of its proper divisors (1).

121240219 is an equidigital number, since it uses as much as digits as its factorization.

121240219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 121240219 is about 11010.9136314840. The cubic root of 121240219 is about 494.9358404072.

The spelling of 121240219 in words is "one hundred twenty-one million, two hundred forty thousand, two hundred nineteen".