121500619 has 2 divisors, whose sum is σ = 121500620. Its totient is φ = 121500618.

The previous prime is 121500607. The next prime is 121500623. The reversal of 121500619 is 916005121.

It is a strong prime.

It is an emirp because it is prime and its reverse (916005121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121500619 - 2²³ = 113112011 is a prime.

It is a super-2 number, since 2×121500619² = 29524800834766322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121500593 and 121500602.

It is not a weakly prime, because it can be changed into another prime (121500019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60750309 + 60750310.

It is an arithmetic number, because the mean of its divisors is an integer number (60750310).

Almost surely, 2^121500619 is an apocalyptic number.

121500619 is a deficient number, since it is larger than the sum of its proper divisors (1).

121500619 is an equidigital number, since it uses as much as digits as its factorization.

121500619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 121500619 is about 11022.7319208987. The cubic root of 121500619 is about 495.2899284410.

The spelling of 121500619 in words is "one hundred twenty-one million, five hundred thousand, six hundred nineteen".