121880000 has 140 divisors (see below), whose sum is σ = 330887832. Its totient is φ = 44160000.

The previous prime is 121879999. The next prime is 121880023. The reversal of 121880000 is 88121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 439862 + ... + 440138.

Almost surely, 2^121880000 is an apocalyptic number.

121880000 is a gapful number since it is divisible by the number (10) 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 121880000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165443916).

121880000 is an abundant number, since it is smaller than the sum of its proper divisors (209007832).

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

121880000 is an equidigital number, since it uses as much as digits as its factorization.

121880000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 121880000 is about 11039.9275359941. The cubic root of 121880000 is about 495.8049007227.

It can be divided in two parts, 1218 and 80000, that added together give a palindrome (81218).

The spelling of 121880000 in words is "one hundred twenty-one million, eight hundred eighty thousand".