111211200201001 has 2 divisors, whose sum is σ = 111211200201002. Its totient is φ = 111211200201000.

The previous prime is 111211200200987. The next prime is 111211200201019. The reversal of 111211200201001 is 100102002112111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62756737267225 + 48454462933776 = 7921915^2 + 6960924^2 .

It is an emirp because it is prime and its reverse (100102002112111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111211200201001 - 2⁹ = 111211200200489 is a prime.

It is not a weakly prime, because it can be changed into another prime (111211200261001) 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, 55605600100500 + 55605600100501.

It is an arithmetic number, because the mean of its divisors is an integer number (55605600100501).

Almost surely, 2^{111211200201001} is an apocalyptic number.

It is an amenable number.

111211200201001 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211200201001 is an equidigital number, since it uses as much as digits as its factorization.

111211200201001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111211200201001 its reverse (100102002112111), we get a palindrome (211313202313112).

The spelling of 111211200201001 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred million, two hundred one thousand, one".