111099137909 has 2 divisors, whose sum is σ = 111099137910. Its totient is φ = 111099137908.

The previous prime is 111099137869. The next prime is 111099137917. The reversal of 111099137909 is 909731990111.

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., 72409428100 + 38689709809 = 269090^2 + 196697^2 .

It is a cyclic number.

It is not a de Polignac number, because 111099137909 - 2¹² = 111099133813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111099137999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55549568954 + 55549568955.

It is an arithmetic number, because the mean of its divisors is an integer number (55549568955).

Almost surely, 2^111099137909 is an apocalyptic number.

It is an amenable number.

111099137909 is a deficient number, since it is larger than the sum of its proper divisors (1).

111099137909 is an equidigital number, since it uses as much as digits as its factorization.

111099137909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 137781, while the sum is 50.

The spelling of 111099137909 in words is "one hundred eleven billion, ninety-nine million, one hundred thirty-seven thousand, nine hundred nine".