12031100321 has 2 divisors, whose sum is σ = 12031100322. Its totient is φ = 12031100320.

The previous prime is 12031100317. The next prime is 12031100327. The reversal of 12031100321 is 12300113021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7662551296 + 4368549025 = 87536^2 + 66095^2 .

It is a cyclic number.

It is not a de Polignac number, because 12031100321 - 2² = 12031100317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12031100296 and 12031100305.

It is not a weakly prime, because it can be changed into another prime (12031100327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6015550160 + 6015550161.

It is an arithmetic number, because the mean of its divisors is an integer number (6015550161).

Almost surely, 2^12031100321 is an apocalyptic number.

It is an amenable number.

12031100321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12031100321 is an equidigital number, since it uses as much as digits as its factorization.

12031100321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 12031100321 its reverse (12300113021), we get a palindrome (24331213342).

The spelling of 12031100321 in words is "twelve billion, thirty-one million, one hundred thousand, three hundred twenty-one".