121201105215 has 8 divisors (see below), whose sum is σ = 193921768368. Its totient is φ = 64640589440.

The previous prime is 121201105159. The next prime is 121201105261. The reversal of 121201105215 is 512501102121.

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

It is not a de Polignac number, because 121201105215 - 2¹⁰ = 121201104191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121201105191 and 121201105200.

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, 4040036826 + ... + 4040036855.

It is an arithmetic number, because the mean of its divisors is an integer number (24240221046).

Almost surely, 2^121201105215 is an apocalyptic number.

121201105215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121201105215 is a deficient number, since it is larger than the sum of its proper divisors (72720663153).

121201105215 is an equidigital number, since it uses as much as digits as its factorization.

121201105215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8080073689.

The product of its (nonzero) digits is 200, while the sum is 21.

Adding to 121201105215 its reverse (512501102121), we get a palindrome (633702207336).

The spelling of 121201105215 in words is "one hundred twenty-one billion, two hundred one million, one hundred five thousand, two hundred fifteen".