1111225109 has 2 divisors, whose sum is σ = 1111225110. Its totient is φ = 1111225108.

The previous prime is 1111225069. The next prime is 1111225117. The reversal of 1111225109 is 9015221111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 991935025 + 119290084 = 31495^2 + 10922^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111225109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111225169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555612554 + 555612555.

It is an arithmetic number, because the mean of its divisors is an integer number (555612555).

Almost surely, 2^1111225109 is an apocalyptic number.

It is an amenable number.

1111225109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111225109 is an equidigital number, since it uses as much as digits as its factorization.

1111225109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 23.

The square root of 1111225109 is about 33335.0432578090. The cubic root of 1111225109 is about 1035.7795892345.

The spelling of 1111225109 in words is "one billion, one hundred eleven million, two hundred twenty-five thousand, one hundred nine".