12231220321291 has 2 divisors, whose sum is σ = 12231220321292. Its totient is φ = 12231220321290.

The previous prime is 12231220321241. The next prime is 12231220321433. The reversal of 12231220321291 is 19212302213221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12231220321291 - 2⁷ = 12231220321163 is a prime.

It is not a weakly prime, because it can be changed into another prime (12231220321211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6115610160645 + 6115610160646.

It is an arithmetic number, because the mean of its divisors is an integer number (6115610160646).

Almost surely, 2^{12231220321291} is an apocalyptic number.

12231220321291 is a deficient number, since it is larger than the sum of its proper divisors (1).

12231220321291 is an equidigital number, since it uses as much as digits as its factorization.

12231220321291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 12231220321291 in words is "twelve trillion, two hundred thirty-one billion, two hundred twenty million, three hundred twenty-one thousand, two hundred ninety-one".