1091010991911 has 8 divisors (see below), whose sum is σ = 1456479448560. Its totient is φ = 726441598272.

The previous prime is 1091010991909. The next prime is 1091010991933. The reversal of 1091010991911 is 1191990101901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1091010991911 - 2¹ = 1091010991909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091010991901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224762920 + ... + 224767773.

It is an arithmetic number, because the mean of its divisors is an integer number (182059931070).

Almost surely, 2^{1091010991911} is an apocalyptic number.

1091010991911 is a deficient number, since it is larger than the sum of its proper divisors (365468456649).

1091010991911 is an equidigital number, since it uses as much as digits as its factorization.

1091010991911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449531505.

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

The spelling of 1091010991911 in words is "one trillion, ninety-one billion, ten million, nine hundred ninety-one thousand, nine hundred eleven".