11123201321 has 2 divisors, whose sum is σ = 11123201322. Its totient is φ = 11123201320.

The previous prime is 11123201317. The next prime is 11123201329. The reversal of 11123201321 is 12310232111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9063040000 + 2060161321 = 95200^2 + 45389^2 .

It is a cyclic number.

It is not a de Polignac number, because 11123201321 - 2² = 11123201317 is a prime.

It is a super-2 number, since 2×11123201321² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11123201321.

It is not a weakly prime, because it can be changed into another prime (11123201329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561600660 + 5561600661.

It is an arithmetic number, because the mean of its divisors is an integer number (5561600661).

Almost surely, 2^11123201321 is an apocalyptic number.

It is an amenable number.

11123201321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123201321 is an equidigital number, since it uses as much as digits as its factorization.

11123201321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11123201321 its reverse (12310232111), we get a palindrome (23433433432).

The spelling of 11123201321 in words is "eleven billion, one hundred twenty-three million, two hundred one thousand, three hundred twenty-one".