100001222221111 has 2 divisors, whose sum is σ = 100001222221112. Its totient is φ = 100001222221110.

The previous prime is 100001222221051. The next prime is 100001222221157. The reversal of 100001222221111 is 111122222100001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100001222221111 - 2¹⁷ = 100001222090039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100001222221811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50000611110555 + 50000611110556.

It is an arithmetic number, because the mean of its divisors is an integer number (50000611110556).

Almost surely, 2^{100001222221111} is an apocalyptic number.

100001222221111 is a deficient number, since it is larger than the sum of its proper divisors (1).

100001222221111 is an equidigital number, since it uses as much as digits as its factorization.

100001222221111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 100001222221111 its reverse (111122222100001), we get a palindrome (211123444321112).

The spelling of 100001222221111 in words is "one hundred trillion, one billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred eleven".