2221111102109 has 2 divisors, whose sum is σ = 2221111102110. Its totient is φ = 2221111102108.

The previous prime is 2221111102027. The next prime is 2221111102127. The reversal of 2221111102109 is 9012011111222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1695490452100 + 525620650009 = 1302110^2 + 724997^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221111102109 - 2¹² = 2221111098013 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221111102909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110555551054 + 1110555551055.

It is an arithmetic number, because the mean of its divisors is an integer number (1110555551055).

Almost surely, 2^{2221111102109} is an apocalyptic number.

It is an amenable number.

2221111102109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221111102109 is an equidigital number, since it uses as much as digits as its factorization.

2221111102109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 2221111102109 in words is "two trillion, two hundred twenty-one billion, one hundred eleven million, one hundred two thousand, one hundred nine".