121500 has 72 divisors (see below), whose sum is σ = 397488. Its totient is φ = 32400.

The previous prime is 121493. The next prime is 121501. The reversal of 121500 is 5121.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24298 + ... + 24302.

2¹²¹⁵⁰⁰ is an apocalyptic number.

121500 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 121500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198744).

121500 is an abundant number, since it is smaller than the sum of its proper divisors (275988).

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

121500 is an equidigital number, since it uses as much as digits as its factorization.

121500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34 (or 10 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 121500 is about 348.5685011587. The cubic root of 121500 is about 49.5289087334.

Adding to 121500 its reverse (5121), we get a palindrome (126621).

The spelling of 121500 in words is "one hundred twenty-one thousand, five hundred".