101111009999 has 2 divisors, whose sum is σ = 101111010000. Its totient is φ = 101111009998.

The previous prime is 101111009981. The next prime is 101111010029. The reversal of 101111009999 is 999900111101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101111009999 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101111009969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50555504999 + 50555505000.

It is an arithmetic number, because the mean of its divisors is an integer number (50555505000).

Almost surely, 2^101111009999 is an apocalyptic number.

101111009999 is a deficient number, since it is larger than the sum of its proper divisors (1).

101111009999 is an equidigital number, since it uses as much as digits as its factorization.

101111009999 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 41.

The spelling of 101111009999 in words is "one hundred one billion, one hundred eleven million, nine thousand, nine hundred ninety-nine".