121115566121 has 8 divisors (see below), whose sum is σ = 133434252288. Its totient is φ = 109014910000.

The previous prime is 121115566093. The next prime is 121115566141. The reversal of 121115566121 is 121665511121.

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 121115566121 - 2⁶ = 121115566057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121115566141) 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, 54506345 + ... + 54508566.

It is an arithmetic number, because the mean of its divisors is an integer number (16679281536).

Almost surely, 2^121115566121 is an apocalyptic number.

121115566121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121115566121 is a deficient number, since it is larger than the sum of its proper divisors (12318686167).

121115566121 is a wasteful number, since it uses less digits than its factorization.

121115566121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109015023.

The product of its digits is 3600, while the sum is 32.

The spelling of 121115566121 in words is "one hundred twenty-one billion, one hundred fifteen million, five hundred sixty-six thousand, one hundred twenty-one".