121216020017 has 8 divisors (see below), whose sum is σ = 122595453000. Its totient is φ = 119836975104.

The previous prime is 121216019941. The next prime is 121216020019. The reversal of 121216020017 is 710020612121.

It can be written as a sum of positive squares in 4 ways, for example, as 30609601936 + 90606418081 = 174956^2 + 301009^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121216020017 - 2²⁶ = 121148911153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121216019974 and 121216020001.

It is not an unprimeable number, because it can be changed into a prime (121216020019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556109 + ... + 742757.

It is an arithmetic number, because the mean of its divisors is an integer number (15324431625).

Almost surely, 2^121216020017 is an apocalyptic number.

It is an amenable number.

121216020017 is a deficient number, since it is larger than the sum of its proper divisors (1379432983).

121216020017 is an equidigital number, since it uses as much as digits as its factorization.

121216020017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194035.

The product of its (nonzero) digits is 336, while the sum is 23.

Adding to 121216020017 its reverse (710020612121), we get a palindrome (831236632138).

The spelling of 121216020017 in words is "one hundred twenty-one billion, two hundred sixteen million, twenty thousand, seventeen".