121108988 has 144 divisors (see below), whose sum is σ = 301644000. Its totient is φ = 41771520.

The previous prime is 121108987. The next prime is 121109011. The reversal of 121108988 is 889801121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121108987) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 812738 + ... + 812886.

It is an arithmetic number, because the mean of its divisors is an integer number (2094750).

Almost surely, 2^121108988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121108988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150822000).

121108988 is an abundant number, since it is smaller than the sum of its proper divisors (180535012).

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

121108988 is a wasteful number, since it uses less digits than its factorization.

121108988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 38.

The square root of 121108988 is about 11004.9528849514. The cubic root of 121108988 is about 494.7572022889.

The spelling of 121108988 in words is "one hundred twenty-one million, one hundred eight thousand, nine hundred eighty-eight".