10921090909091 has 16 divisors (see below), whose sum is σ = 12051943434720. Its totient is φ = 9813319802880.

The previous prime is 10921090909063. The next prime is 10921090909103. The reversal of 10921090909091 is 19090909012901.

It is not a de Polignac number, because 10921090909091 - 2¹⁰ = 10921090908067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10921090909021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 910835 + ... + 4761491.

It is an arithmetic number, because the mean of its divisors is an integer number (753246464670).

Almost surely, 2^{10921090909091} is an apocalyptic number.

10921090909091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10921090909091 is a deficient number, since it is larger than the sum of its proper divisors (1130852525629).

10921090909091 is a wasteful number, since it uses less digits than its factorization.

10921090909091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3853654.

The product of its (nonzero) digits is 118098, while the sum is 50.

The spelling of 10921090909091 in words is "ten trillion, nine hundred twenty-one billion, ninety million, nine hundred nine thousand, ninety-one".