100211221211111 has 2 divisors, whose sum is σ = 100211221211112. Its totient is φ = 100211221211110.

The previous prime is 100211221211107. The next prime is 100211221211137. The reversal of 100211221211111 is 111112122112001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100211221211111 - 2² = 100211221211107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100211221211111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100211221211011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50105610605555 + 50105610605556.

It is an arithmetic number, because the mean of its divisors is an integer number (50105610605556).

Almost surely, 2^{100211221211111} is an apocalyptic number.

100211221211111 is a deficient number, since it is larger than the sum of its proper divisors (1).

100211221211111 is an equidigital number, since it uses as much as digits as its factorization.

100211221211111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 100211221211111 its reverse (111112122112001), we get a palindrome (211323343323112).

The spelling of 100211221211111 in words is "one hundred trillion, two hundred eleven billion, two hundred twenty-one million, two hundred eleven thousand, one hundred eleven".