100111010991919 has 2 divisors, whose sum is σ = 100111010991920. Its totient is φ = 100111010991918.

The previous prime is 100111010991917. The next prime is 100111010991941. The reversal of 100111010991919 is 919199010111001.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (919199010111001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100111010991919 - 2¹ = 100111010991917 is a prime.

It is a super-2 number, since 2×100111010991919² (a number of 29 digits) contains 22 as substring.

Together with 100111010991917, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100111010991917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50055505495959 + 50055505495960.

It is an arithmetic number, because the mean of its divisors is an integer number (50055505495960).

Almost surely, 2^{100111010991919} is an apocalyptic number.

100111010991919 is a deficient number, since it is larger than the sum of its proper divisors (1).

100111010991919 is an equidigital number, since it uses as much as digits as its factorization.

100111010991919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6561, while the sum is 43.

The spelling of 100111010991919 in words is "one hundred trillion, one hundred eleven billion, ten million, nine hundred ninety-one thousand, nine hundred nineteen".