122221001011111 has 2 divisors, whose sum is σ = 122221001011112. Its totient is φ = 122221001011110.

The previous prime is 122221001011051. The next prime is 122221001011141. The reversal of 122221001011111 is 111110100122221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122221001011111 - 2⁹ = 122221001010599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122221001011141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61110500505555 + 61110500505556.

It is an arithmetic number, because the mean of its divisors is an integer number (61110500505556).

Almost surely, 2^{122221001011111} is an apocalyptic number.

122221001011111 is a deficient number, since it is larger than the sum of its proper divisors (1).

122221001011111 is an equidigital number, since it uses as much as digits as its factorization.

122221001011111 is an evil number, because the sum of its binary digits is even.

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

Adding to 122221001011111 its reverse (111110100122221), we get a palindrome (233331101133332).

The spelling of 122221001011111 in words is "one hundred twenty-two trillion, two hundred twenty-one billion, one million, eleven thousand, one hundred eleven".