10111111209499 has 2 divisors, whose sum is σ = 10111111209500. Its totient is φ = 10111111209498.

The previous prime is 10111111209491. The next prime is 10111111209539. The reversal of 10111111209499 is 99490211111101.

It is an a-pointer prime, because the next prime (10111111209539) can be obtained adding 10111111209499 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10111111209499 - 2³ = 10111111209491 is a prime.

It is not a weakly prime, because it can be changed into another prime (10111111209491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055555604749 + 5055555604750.

It is an arithmetic number, because the mean of its divisors is an integer number (5055555604750).

Almost surely, 2^{10111111209499} is an apocalyptic number.

10111111209499 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111111209499 is an equidigital number, since it uses as much as digits as its factorization.

10111111209499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 40.

The spelling of 10111111209499 in words is "ten trillion, one hundred eleven billion, one hundred eleven million, two hundred nine thousand, four hundred ninety-nine".