121163856 has 160 divisors (see below), whose sum is σ = 363726720. Its totient is φ = 34406400.

The previous prime is 121163851. The next prime is 121163869. The reversal of 121163856 is 658361121.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121163851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 627696 + ... + 627888.

It is an arithmetic number, because the mean of its divisors is an integer number (2273292).

Almost surely, 2^121163856 is an apocalyptic number.

121163856 is a gapful number since it is divisible by the number (16) 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 121163856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181863360).

121163856 is an abundant number, since it is smaller than the sum of its proper divisors (242562864).

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

121163856 is a wasteful number, since it uses less digits than its factorization.

121163856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 279 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 121163856 is about 11007.4454802193. The cubic root of 121163856 is about 494.8319070104.

The spelling of 121163856 in words is "one hundred twenty-one million, one hundred sixty-three thousand, eight hundred fifty-six".