12021100321 has 2 divisors, whose sum is σ = 12021100322. Its totient is φ = 12021100320.

The previous prime is 12021100309. The next prime is 12021100433. The reversal of 12021100321 is 12300112021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9218880225 + 2802220096 = 96015^2 + 52936^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021100321 - 2⁹ = 12021099809 is a prime.

It is not a weakly prime, because it can be changed into another prime (12031100321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010550160 + 6010550161.

It is an arithmetic number, because the mean of its divisors is an integer number (6010550161).

Almost surely, 2^12021100321 is an apocalyptic number.

It is an amenable number.

12021100321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021100321 is an equidigital number, since it uses as much as digits as its factorization.

12021100321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 12021100321 its reverse (12300112021), we get a palindrome (24321212342).

The spelling of 12021100321 in words is "twelve billion, twenty-one million, one hundred thousand, three hundred twenty-one".