10992811821 has 12 divisors (see below), whose sum is σ = 14803680096. Its totient is φ = 7255961200.

The previous prime is 10992811793. The next prime is 10992811861. The reversal of 10992811821 is 12811829901.

It is a happy number.

It is not a de Polignac number, because 10992811821 - 2⁷ = 10992811693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10992811861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149001 + ... + 210206.

It is an arithmetic number, because the mean of its divisors is an integer number (1233640008).

Almost surely, 2^10992811821 is an apocalyptic number.

It is an amenable number.

10992811821 is a deficient number, since it is larger than the sum of its proper divisors (3810868275).

10992811821 is an equidigital number, since it uses as much as digits as its factorization.

10992811821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359412 (or 359311 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 42.

The spelling of 10992811821 in words is "ten billion, nine hundred ninety-two million, eight hundred eleven thousand, eight hundred twenty-one".