121322500 has 60 divisors (see below), whose sum is σ = 285792892. Its totient is φ = 44784000.

The previous prime is 121322491. The next prime is 121322501. The reversal of 121322500 is 5223121.

It can be written as a sum of positive squares in 10 ways, for example, as 108534724 + 12787776 = 10418^2 + 3576^2 .

It is not an unprimeable number, because it can be changed into a prime (121322501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 30634 + ... + 34366.

Almost surely, 2^121322500 is an apocalyptic number.

121322500 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 121322500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142896446).

121322500 is an abundant number, since it is smaller than the sum of its proper divisors (164470392).

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

121322500 is a wasteful number, since it uses less digits than its factorization.

121322500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770 (or 3753 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 121322500 is about 11014.6493362249. The cubic root of 121322500 is about 495.0477796277.

Adding to 121322500 its reverse (5223121), we get a palindrome (126545621).

The spelling of 121322500 in words is "one hundred twenty-one million, three hundred twenty-two thousand, five hundred".