111201220321 has 2 divisors, whose sum is σ = 111201220322. Its totient is φ = 111201220320.

The previous prime is 111201220303. The next prime is 111201220343. The reversal of 111201220321 is 123022102111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67826910096 + 43374310225 = 260436^2 + 208265^2 .

It is an emirp because it is prime and its reverse (123022102111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111201220321 is a prime.

It is a super-2 number, since 2×111201220321² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111201220295 and 111201220304.

It is not a weakly prime, because it can be changed into another prime (111201220391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55600610160 + 55600610161.

It is an arithmetic number, because the mean of its divisors is an integer number (55600610161).

Almost surely, 2^111201220321 is an apocalyptic number.

It is an amenable number.

111201220321 is a deficient number, since it is larger than the sum of its proper divisors (1).

111201220321 is an equidigital number, since it uses as much as digits as its factorization.

111201220321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 111201220321 its reverse (123022102111), we get a palindrome (234223322432).

The spelling of 111201220321 in words is "one hundred eleven billion, two hundred one million, two hundred twenty thousand, three hundred twenty-one".