11111221307 has 2 divisors, whose sum is σ = 11111221308. Its totient is φ = 11111221306.

The previous prime is 11111221279. The next prime is 11111221313. The reversal of 11111221307 is 70312211111.

11111221307 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11111221307 - 2¹² = 11111217211 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111221357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555610653 + 5555610654.

It is an arithmetic number, because the mean of its divisors is an integer number (5555610654).

Almost surely, 2^11111221307 is an apocalyptic number.

11111221307 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111221307 is an equidigital number, since it uses as much as digits as its factorization.

11111221307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 20.

Adding to 11111221307 its reverse (70312211111), we get a palindrome (81423432418).

The spelling of 11111221307 in words is "eleven billion, one hundred eleven million, two hundred twenty-one thousand, three hundred seven".