122220111109 has 2 divisors, whose sum is σ = 122220111110. Its totient is φ = 122220111108.

The previous prime is 122220111067. The next prime is 122220111133. The reversal of 122220111109 is 901111022221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69039139009 + 53180972100 = 262753^2 + 230610^2 .

It is a cyclic number.

It is not a de Polignac number, because 122220111109 - 2¹⁷ = 122219980037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122220111109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122220111199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61110055554 + 61110055555.

It is an arithmetic number, because the mean of its divisors is an integer number (61110055555).

Almost surely, 2^122220111109 is an apocalyptic number.

It is an amenable number.

122220111109 is a deficient number, since it is larger than the sum of its proper divisors (1).

122220111109 is an equidigital number, since it uses as much as digits as its factorization.

122220111109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 122220111109 in words is "one hundred twenty-two billion, two hundred twenty million, one hundred eleven thousand, one hundred nine".