1000122211111 has 2 divisors, whose sum is σ = 1000122211112. Its totient is φ = 1000122211110.

The previous prime is 1000122211091. The next prime is 1000122211157. The reversal of 1000122211111 is 1111122210001.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1111122210001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1000122211111 - 2⁹ = 1000122210599 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000122211091 and 1000122211100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000122011111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500061105555 + 500061105556.

It is an arithmetic number, because the mean of its divisors is an integer number (500061105556).

Almost surely, 2^{1000122211111} is an apocalyptic number.

1000122211111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000122211111 is an equidigital number, since it uses as much as digits as its factorization.

1000122211111 is an evil number, because the sum of its binary digits is even.

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

Adding to 1000122211111 its reverse (1111122210001), we get a palindrome (2111244421112).

The spelling of 1000122211111 in words is "one trillion, one hundred twenty-two million, two hundred eleven thousand, one hundred eleven".