999998881111 has 2 divisors, whose sum is σ = 999998881112. Its totient is φ = 999998881110.

The previous prime is 999998881099. The next prime is 999998881117. The reversal of 999998881111 is 111188899999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999998881111 - 2⁷ = 999998880983 is a prime.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999998881117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999440555 + 499999440556.

It is an arithmetic number, because the mean of its divisors is an integer number (499999440556).

Almost surely, 2^999998881111 is an apocalyptic number.

999998881111 is a deficient number, since it is larger than the sum of its proper divisors (1).

999998881111 is an equidigital number, since it uses as much as digits as its factorization.

999998881111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30233088, while the sum is 73.

The spelling of 999998881111 in words is "nine hundred ninety-nine billion, nine hundred ninety-eight million, eight hundred eighty-one thousand, one hundred eleven".