12121233112321 has 16 divisors (see below), whose sum is σ = 12478324795200. Its totient is φ = 11767677784128.

The previous prime is 12121233112297. The next prime is 12121233112409. The reversal of 12121233112321 is 12321133212121.

It is a cyclic number.

It is not a de Polignac number, because 12121233112321 - 2¹³ = 12121233104129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121233112921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7929835 + ... + 9334063.

It is an arithmetic number, because the mean of its divisors is an integer number (779895299700).

Almost surely, 2^{12121233112321} is an apocalyptic number.

It is an amenable number.

12121233112321 is a deficient number, since it is larger than the sum of its proper divisors (357091682879).

12121233112321 is a wasteful number, since it uses less digits than its factorization.

12121233112321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405488.

The product of its digits is 864, while the sum is 25.

Adding to 12121233112321 its reverse (12321133212121), we get a palindrome (24442366324442).

The spelling of 12121233112321 in words is "twelve trillion, one hundred twenty-one billion, two hundred thirty-three million, one hundred twelve thousand, three hundred twenty-one".