11111109999937 has 2 divisors, whose sum is σ = 11111109999938. Its totient is φ = 11111109999936.

The previous prime is 11111109999881. The next prime is 11111109999959. The reversal of 11111109999937 is 73999990111111.

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., 11048204845456 + 62905154481 = 3323884^2 + 250809^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111109999937 - 2¹⁹ = 11111109475649 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111109919937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555554999968 + 5555554999969.

It is an arithmetic number, because the mean of its divisors is an integer number (5555554999969).

Almost surely, 2^{11111109999937} is an apocalyptic number.

It is an amenable number.

11111109999937 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111109999937 is an equidigital number, since it uses as much as digits as its factorization.

11111109999937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1240029, while the sum is 61.

The spelling of 11111109999937 in words is "eleven trillion, one hundred eleven billion, one hundred nine million, nine hundred ninety-nine thousand, nine hundred thirty-seven".