121324221 has 12 divisors (see below), whose sum is σ = 179982972. Its totient is φ = 78696576.

The previous prime is 121324219. The next prime is 121324271. The reversal of 121324221 is 122423121.

It is a happy number.

121324221 is a `hidden beast` number, since 121 + 324 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 113422500 + 7901721 = 10650^2 + 2811^2 .

It is not a de Polignac number, because 121324221 - 2¹ = 121324219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121324194 and 121324203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121324211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181836 + ... + 182501.

It is an arithmetic number, because the mean of its divisors is an integer number (14998581).

Almost surely, 2^121324221 is an apocalyptic number.

It is an amenable number.

121324221 is a deficient number, since it is larger than the sum of its proper divisors (58658751).

121324221 is a wasteful number, since it uses less digits than its factorization.

121324221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364380 (or 364377 counting only the distinct ones).

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

The square root of 121324221 is about 11014.7274591794. The cubic root of 121324221 is about 495.0501204224.

Adding to 121324221 its reverse (122423121), we get a palindrome (243747342).

The spelling of 121324221 in words is "one hundred twenty-one million, three hundred twenty-four thousand, two hundred twenty-one".