111211001221007 has 2 divisors, whose sum is σ = 111211001221008. Its totient is φ = 111211001221006.

The previous prime is 111211001220989. The next prime is 111211001221013. The reversal of 111211001221007 is 700122100112111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111211001221007 - 2¹² = 111211001216911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111211001221007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111211001221037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605500610503 + 55605500610504.

It is an arithmetic number, because the mean of its divisors is an integer number (55605500610504).

Almost surely, 2^{111211001221007} is an apocalyptic number.

111211001221007 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211001221007 is an equidigital number, since it uses as much as digits as its factorization.

111211001221007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 20.

Adding to 111211001221007 its reverse (700122100112111), we get a palindrome (811333101333118).

The spelling of 111211001221007 in words is "one hundred eleven trillion, two hundred eleven billion, one million, two hundred twenty-one thousand, seven".