1001222122111 has 2 divisors, whose sum is σ = 1001222122112. Its totient is φ = 1001222122110.

The previous prime is 1001222122091. The next prime is 1001222122163. The reversal of 1001222122111 is 1112212221001.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001222122111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001222122181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500611061055 + 500611061056.

It is an arithmetic number, because the mean of its divisors is an integer number (500611061056).

Almost surely, 2^{1001222122111} is an apocalyptic number.

1001222122111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001222122111 is an equidigital number, since it uses as much as digits as its factorization.

1001222122111 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 1001222122111 its reverse (1112212221001), we get a palindrome (2113434343112).

The spelling of 1001222122111 in words is "one trillion, one billion, two hundred twenty-two million, one hundred twenty-two thousand, one hundred eleven".