121221300 has 72 divisors (see below), whose sum is σ = 358928416. Its totient is φ = 31570560.

The previous prime is 121221283. The next prime is 121221337. The reversal of 121221300 is 3122121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nialpdrome in base 15.

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, 8202 + ... + 17598.

Almost surely, 2^121221300 is an apocalyptic number.

121221300 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 121221300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179464208).

121221300 is an abundant number, since it is smaller than the sum of its proper divisors (237707116).

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

121221300 is a wasteful number, since it uses less digits than its factorization.

121221300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9457 (or 9450 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 121221300 is about 11010.0544957779. The cubic root of 121221300 is about 494.9100948850.

Adding to 121221300 its reverse (3122121), we get a palindrome (124343421).

The spelling of 121221300 in words is "one hundred twenty-one million, two hundred twenty-one thousand, three hundred".