12213320121 has 24 divisors (see below), whose sum is σ = 18139680000. Its totient is φ = 7912787616.

The previous prime is 12213320117. The next prime is 12213320179. The reversal of 12213320121 is 12102331221.

12213320121 is a `hidden beast` number, since 1 + 221 + 3 + 320 + 121 = 666.

It is not a de Polignac number, because 12213320121 - 2² = 12213320117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12213320094 and 12213320103.

It is not an unprimeable number, because it can be changed into a prime (12213320221) 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, 266130 + ... + 308628.

It is an arithmetic number, because the mean of its divisors is an integer number (755820000).

Almost surely, 2^12213320121 is an apocalyptic number.

It is an amenable number.

12213320121 is a deficient number, since it is larger than the sum of its proper divisors (5926359879).

12213320121 is a wasteful number, since it uses less digits than its factorization.

12213320121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43405 (or 43402 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12213320121 its reverse (12102331221), we get a palindrome (24315651342).

The spelling of 12213320121 in words is "twelve billion, two hundred thirteen million, three hundred twenty thousand, one hundred twenty-one".