100011001221211 has 2 divisors, whose sum is σ = 100011001221212. Its totient is φ = 100011001221210.

The previous prime is 100011001221203. The next prime is 100011001221221. The reversal of 100011001221211 is 112122100110001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100011001221211 - 2³ = 100011001221203 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100011001221191 and 100011001221200.

It is not a weakly prime, because it can be changed into another prime (100011001221221) 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, 50005500610605 + 50005500610606.

It is an arithmetic number, because the mean of its divisors is an integer number (50005500610606).

Almost surely, 2^{100011001221211} is an apocalyptic number.

100011001221211 is a deficient number, since it is larger than the sum of its proper divisors (1).

100011001221211 is an equidigital number, since it uses as much as digits as its factorization.

100011001221211 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 100011001221211 its reverse (112122100110001), we get a palindrome (212133101331212).

The spelling of 100011001221211 in words is "one hundred trillion, eleven billion, one million, two hundred twenty-one thousand, two hundred eleven".