121846350217 has 4 divisors (see below), whose sum is σ = 121876225920. Its totient is φ = 121816474516.

The previous prime is 121846350187. The next prime is 121846350221. The reversal of 121846350217 is 712053648121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 712053648121 = 17 ⋅41885508713.

It is a cyclic number.

It is not a de Polignac number, because 121846350217 - 2²⁷ = 121712132489 is a prime.

It is a super-2 number, since 2×121846350217² (a number of 23 digits) 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 121846350217.

It is not an unprimeable number, because it can be changed into a prime (121846350247) 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 in 3 ways as a sum of consecutive naturals, for example, 14931733 + ... + 14939890.

It is an arithmetic number, because the mean of its divisors is an integer number (30469056480).

Almost surely, 2^121846350217 is an apocalyptic number.

It is an amenable number.

121846350217 is a deficient number, since it is larger than the sum of its proper divisors (29875703).

121846350217 is an equidigital number, since it uses as much as digits as its factorization.

121846350217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29875702.

The product of its (nonzero) digits is 80640, while the sum is 40.

Adding to 121846350217 its reverse (712053648121), we get a palindrome (833899998338).

The spelling of 121846350217 in words is "one hundred twenty-one billion, eight hundred forty-six million, three hundred fifty thousand, two hundred seventeen".