121280112 has 80 divisors (see below), whose sum is σ = 354754080. Its totient is φ = 39656448.

The previous prime is 121280101. The next prime is 121280119. The reversal of 121280112 is 211082121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121280119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20248 + ... + 25544.

It is an arithmetic number, because the mean of its divisors is an integer number (4434426).

Almost surely, 2^121280112 is an apocalyptic number.

121280112 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 121280112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177377040).

121280112 is an abundant number, since it is smaller than the sum of its proper divisors (233473968).

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

121280112 is a wasteful number, since it uses less digits than its factorization.

121280112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5367 (or 5355 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 121280112 is about 11012.7250033768. The cubic root of 121280112 is about 494.9901191783.

The spelling of 121280112 in words is "one hundred twenty-one million, two hundred eighty thousand, one hundred twelve".