1000991199111 has 96 divisors (see below), whose sum is σ = 1423728446400. Its totient is φ = 625365688320.

The previous prime is 1000991199101. The next prime is 1000991199119. The reversal of 1000991199111 is 1119911990001.

It is not a de Polignac number, because 1000991199111 - 2⁵ = 1000991199079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000991199119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4296099451 + ... + 4296099683.

It is an arithmetic number, because the mean of its divisors is an integer number (14830504650).

Almost surely, 2^{1000991199111} is an apocalyptic number.

1000991199111 is a deficient number, since it is larger than the sum of its proper divisors (422737247289).

1000991199111 is a wasteful number, since it uses less digits than its factorization.

1000991199111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657 (or 626 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 42.

The spelling of 1000991199111 in words is "one trillion, nine hundred ninety-one million, one hundred ninety-nine thousand, one hundred eleven".