121618588 has 72 divisors (see below), whose sum is σ = 271479600. Its totient is φ = 47238912.

The previous prime is 121618559. The next prime is 121618597. The reversal of 121618588 is 885816121.

It is a super-2 number, since 2×121618588² = 29582161894227488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121618588.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149928 + ... + 150736.

It is an arithmetic number, because the mean of its divisors is an integer number (3770550).

Almost surely, 2^121618588 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 121618588, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135739800).

121618588 is an abundant number, since it is smaller than the sum of its proper divisors (149861012).

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

121618588 is a wasteful number, since it uses less digits than its factorization.

121618588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899 (or 890 counting only the distinct ones).

The product of its digits is 30720, while the sum is 40.

The square root of 121618588 is about 11028.0817914994. The cubic root of 121618588 is about 495.4501744218.

The spelling of 121618588 in words is "one hundred twenty-one million, six hundred eighteen thousand, five hundred eighty-eight".