12321011221321 has 16 divisors (see below), whose sum is σ = 13483426682880. Its totient is φ = 11165672296080.

The previous prime is 12321011221273. The next prime is 12321011221331. The reversal of 12321011221321 is 12312211012321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12321011221321 - 2¹⁵ = 12321011188553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12321011221292 and 12321011221301.

It is not an unprimeable number, because it can be changed into a prime (12321011221331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10363090 + ... + 11490676.

It is an arithmetic number, because the mean of its divisors is an integer number (842714167680).

Almost surely, 2^{12321011221321} is an apocalyptic number.

12321011221321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12321011221321 is a deficient number, since it is larger than the sum of its proper divisors (1162415461559).

12321011221321 is a wasteful number, since it uses less digits than its factorization.

12321011221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130724.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 12321011221321 its reverse (12312211012321), we get a palindrome (24633222233642).

The spelling of 12321011221321 in words is "twelve trillion, three hundred twenty-one billion, eleven million, two hundred twenty-one thousand, three hundred twenty-one".