121215699201 has 8 divisors (see below), whose sum is σ = 161622879040. Its totient is φ = 80809492752.

The previous prime is 121215699197. The next prime is 121215699277. The reversal of 121215699201 is 102996512121.

It is a happy number.

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

It is not a de Polignac number, because 121215699201 - 2² = 121215699197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121215699201.

It is not an unprimeable number, because it can be changed into a prime (121215699281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128316 + ... + 508818.

It is an arithmetic number, because the mean of its divisors is an integer number (20202859880).

Almost surely, 2^121215699201 is an apocalyptic number.

It is an amenable number.

121215699201 is a deficient number, since it is larger than the sum of its proper divisors (40407179839).

121215699201 is a wasteful number, since it uses less digits than its factorization.

121215699201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486695.

The product of its (nonzero) digits is 19440, while the sum is 39.

The spelling of 121215699201 in words is "one hundred twenty-one billion, two hundred fifteen million, six hundred ninety-nine thousand, two hundred one".