1220012122111 has 2 divisors, whose sum is σ = 1220012122112. Its totient is φ = 1220012122110.

The previous prime is 1220012122081. The next prime is 1220012122127. The reversal of 1220012122111 is 1112212100221.

It is an a-pointer prime, because the next prime (1220012122127) can be obtained adding 1220012122111 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220012122111 - 2²⁵ = 1219978567679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220012122151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610006061055 + 610006061056.

It is an arithmetic number, because the mean of its divisors is an integer number (610006061056).

Almost surely, 2^{1220012122111} is an apocalyptic number.

1220012122111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220012122111 is an equidigital number, since it uses as much as digits as its factorization.

1220012122111 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 1220012122111 its reverse (1112212100221), we get a palindrome (2332224222332).

The spelling of 1220012122111 in words is "one trillion, two hundred twenty billion, twelve million, one hundred twenty-two thousand, one hundred eleven".