111001321 has 2 divisors, whose sum is σ = 111001322. Its totient is φ = 111001320.

The previous prime is 111001307. The next prime is 111001333. The reversal of 111001321 is 123100111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96255721 + 14745600 = 9811^2 + 3840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111001321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111001298 and 111001307.

It is not a weakly prime, because it can be changed into another prime (111001621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55500660 + 55500661.

It is an arithmetic number, because the mean of its divisors is an integer number (55500661).

Almost surely, 2^111001321 is an apocalyptic number.

It is an amenable number.

111001321 is a deficient number, since it is larger than the sum of its proper divisors (1).

111001321 is an equidigital number, since it uses as much as digits as its factorization.

111001321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 111001321 is about 10535.7164445518. The cubic root of 111001321 is about 480.5914598459.

Adding to 111001321 its reverse (123100111), we get a palindrome (234101432).

It can be divided in two parts, 11100 and 1321, that added together give a palindrome (12421).

The spelling of 111001321 in words is "one hundred eleven million, one thousand, three hundred twenty-one".