121221324 has 72 divisors (see below), whose sum is σ = 359687328. Its totient is φ = 33696000.

The previous prime is 121221283. The next prime is 121221337. The reversal of 121221324 is 423122121.

It is a happy number.

121221324 is a `hidden beast` number, since 121 + 221 + 324 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 121221297 and 121221306.

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, 2824 + ... + 15824.

Almost surely, 2^121221324 is an apocalyptic number.

121221324 is a gapful number since it is divisible by the number (14) 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 121221324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179843664).

121221324 is an abundant number, since it is smaller than the sum of its proper divisors (238466004).

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

121221324 is a wasteful number, since it uses less digits than its factorization.

121221324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13055 (or 13050 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 121221324 is about 11010.0555856907. The cubic root of 121221324 is about 494.9101275466.

Adding to 121221324 its reverse (423122121), we get a palindrome (544343445).

It can be divided in two parts, 121 and 221324, that added together give a triangular number (221445 = T₆₆₅).

The spelling of 121221324 in words is "one hundred twenty-one million, two hundred twenty-one thousand, three hundred twenty-four".