12011011321 has 2 divisors, whose sum is σ = 12011011322. Its totient is φ = 12011011320.

The previous prime is 12011011319. The next prime is 12011011339. The reversal of 12011011321 is 12311011021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11933377600 + 77633721 = 109240^2 + 8811^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011011321 - 2¹ = 12011011319 is a prime.

Together with 12011011319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12011011361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005505660 + 6005505661.

It is an arithmetic number, because the mean of its divisors is an integer number (6005505661).

Almost surely, 2^12011011321 is an apocalyptic number.

It is an amenable number.

12011011321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011011321 is an equidigital number, since it uses as much as digits as its factorization.

12011011321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 12011011321 its reverse (12311011021), we get a palindrome (24322022342).

The spelling of 12011011321 in words is "twelve billion, eleven million, eleven thousand, three hundred twenty-one".