121216432215 has 8 divisors (see below), whose sum is σ = 193946291568. Its totient is φ = 64648763840.

The previous prime is 121216432177. The next prime is 121216432223. The reversal of 121216432215 is 512234612121.

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

It is not a de Polignac number, because 121216432215 - 2⁹ = 121216431703 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4040547726 + ... + 4040547755.

It is an arithmetic number, because the mean of its divisors is an integer number (24243286446).

Almost surely, 2^121216432215 is an apocalyptic number.

121216432215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121216432215 is a deficient number, since it is larger than the sum of its proper divisors (72729859353).

121216432215 is an equidigital number, since it uses as much as digits as its factorization.

121216432215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8081095489.

The product of its digits is 5760, while the sum is 30.

The spelling of 121216432215 in words is "one hundred twenty-one billion, two hundred sixteen million, four hundred thirty-two thousand, two hundred fifteen".