121201209215 has 8 divisors (see below), whose sum is σ = 153996830640. Its totient is φ = 91257380992.

The previous prime is 121201209203. The next prime is 121201209229. The reversal of 121201209215 is 512902102121.

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 121201209215 - 2¹⁸ = 121200947071 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 712948205 + ... + 712948374.

It is an arithmetic number, because the mean of its divisors is an integer number (19249603830).

Almost surely, 2^121201209215 is an apocalyptic number.

121201209215 is a deficient number, since it is larger than the sum of its proper divisors (32795621425).

121201209215 is a wasteful number, since it uses less digits than its factorization.

121201209215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425896601.

The product of its (nonzero) digits is 720, while the sum is 26.

The spelling of 121201209215 in words is "one hundred twenty-one billion, two hundred one million, two hundred nine thousand, two hundred fifteen".