10991199110 has 32 divisors (see below), whose sum is σ = 20430123264. Its totient is φ = 4253040000.

The previous prime is 10991199103. The next prime is 10991199119. The reversal of 10991199110 is 1199119901.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10991199119) 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, 1105160 + ... + 1115060.

It is an arithmetic number, because the mean of its divisors is an integer number (638441352).

Almost surely, 2^10991199110 is an apocalyptic number.

10991199110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10991199110 is a deficient number, since it is larger than the sum of its proper divisors (9438924154).

10991199110 is a wasteful number, since it uses less digits than its factorization.

10991199110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13520.

The product of its (nonzero) digits is 6561, while the sum is 41.

The spelling of 10991199110 in words is "ten billion, nine hundred ninety-one million, one hundred ninety-nine thousand, one hundred ten".