122221110011111 has 2 divisors, whose sum is σ = 122221110011112. Its totient is φ = 122221110011110.

The previous prime is 122221110011083. The next prime is 122221110011123. The reversal of 122221110011111 is 111110011122221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122221110011111 - 2¹⁴ = 122221109994727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122221110011111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122221110011911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61110555005555 + 61110555005556.

It is an arithmetic number, because the mean of its divisors is an integer number (61110555005556).

Almost surely, 2^{122221110011111} is an apocalyptic number.

122221110011111 is a deficient number, since it is larger than the sum of its proper divisors (1).

122221110011111 is an equidigital number, since it uses as much as digits as its factorization.

122221110011111 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 122221110011111 its reverse (111110011122221), we get a palindrome (233331121133332).

The spelling of 122221110011111 in words is "one hundred twenty-two trillion, two hundred twenty-one billion, one hundred ten million, eleven thousand, one hundred eleven".