120991101011 has 8 divisors (see below), whose sum is σ = 132259117248. Its totient is φ = 109767889000.

The previous prime is 120991100963. The next prime is 120991101017. The reversal of 120991101011 is 110101199021.

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

It is a de Polignac number, because none of the positive numbers 2^k-120991101011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120991101017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11195405 + ... + 11206206.

It is an arithmetic number, because the mean of its divisors is an integer number (16532389656).

Almost surely, 2^120991101011 is an apocalyptic number.

120991101011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

120991101011 is a deficient number, since it is larger than the sum of its proper divisors (11268016237).

120991101011 is a wasteful number, since it uses less digits than its factorization.

120991101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22402113.

The product of its (nonzero) digits is 162, while the sum is 26.

It can be divided in two parts, 12099110 and 1011, that added together give a palindrome (12100121).

The spelling of 120991101011 in words is "one hundred twenty billion, nine hundred ninety-one million, one hundred one thousand, eleven".