121075661112 has 96 divisors (see below), whose sum is σ = 353448366720. Its totient is φ = 33856920000.

The previous prime is 121075661093. The next prime is 121075661129. The reversal of 121075661112 is 211166570121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207987 + ... + 534237.

It is an arithmetic number, because the mean of its divisors is an integer number (3681753820).

Almost surely, 2^121075661112 is an apocalyptic number.

121075661112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121075661112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176724183360).

121075661112 is an abundant number, since it is smaller than the sum of its proper divisors (232372705608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121075661112 is a wasteful number, since it uses less digits than its factorization.

121075661112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326361 (or 326310 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 33.

Subtracting 121075661112 from its reverse (211166570121), we obtain a palindrome (90090909009).

The spelling of 121075661112 in words is "one hundred twenty-one billion, seventy-five million, six hundred sixty-one thousand, one hundred twelve".