121216020215 has 8 divisors (see below), whose sum is σ = 145762899840. Its totient is φ = 96770365792.

The previous prime is 121216020209. The next prime is 121216020217. The reversal of 121216020215 is 512020612121.

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 121216020215 - 2⁴ = 121216020199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121216020217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25303664 + ... + 25308453.

It is an arithmetic number, because the mean of its divisors is an integer number (18220362480).

Almost surely, 2^121216020215 is an apocalyptic number.

121216020215 is a deficient number, since it is larger than the sum of its proper divisors (24546879625).

121216020215 is an equidigital number, since it uses as much as digits as its factorization.

121216020215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50612601.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 121216020215 its reverse (512020612121), we get a palindrome (633236632336).

The spelling of 121216020215 in words is "one hundred twenty-one billion, two hundred sixteen million, twenty thousand, two hundred fifteen".