121903219 has 2 divisors, whose sum is σ = 121903220. Its totient is φ = 121903218.

The previous prime is 121903213. The next prime is 121903247. The reversal of 121903219 is 912309121.

It is an a-pointer prime, because the next prime (121903247) can be obtained adding 121903219 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121903219 - 2⁷ = 121903091 is a prime.

It is a super-2 number, since 2×121903219² = 29720789605123922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121903213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60951609 + 60951610.

It is an arithmetic number, because the mean of its divisors is an integer number (60951610).

Almost surely, 2^121903219 is an apocalyptic number.

121903219 is a deficient number, since it is larger than the sum of its proper divisors (1).

121903219 is an equidigital number, since it uses as much as digits as its factorization.

121903219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 121903219 is about 11040.9790779622. The cubic root of 121903219 is about 495.8363835009.

The spelling of 121903219 in words is "one hundred twenty-one million, nine hundred three thousand, two hundred nineteen".